Eric Harris and Dylan Klebold

Eric David Harris (April 9, 1981 – April 20, 1999) and Dylan Bennet Klebold (September 11, 1981 – April 20, 1999) were two American high school seniors and mass murderers who perpetrated the Columbine High School massacre at Columbine High School on April 20, 1999 in Columbine, Colorado. Harris and Klebold killed 12 students, one teacher, and wounded 24 others. After killing most of their victims in the school's library, they died by self-inflicted gunshot wounds. At the time, it was the deadliest high school shooting in U.S. history.

The ensuing media frenzy and moral panic led to "Columbine" becoming a byword for school shootings, and becoming one of the most infamous mass shootings ever perpetrated in the United States.

Harris and Klebold were both born in 1981. Harris was born in Wichita, Kansas, but moved around frequently as a child due to his father's occupation in the United States Air Force, while Klebold was born and raised near Columbine. Harris's family eventually settled in Colorado in 1992. Shortly after, Harris and Klebold met while they were in the 7th grade. Over time, they became increasingly close. By the time they were juniors in high school, they were described as inseparable. There are differing reports; some say Harris and Klebold were very unpopular students once they were upperclassmen, as well as frequent targets of bullying, while others say they were not near the bottom of the school's social hierarchy and that each had many friends, along with active social lives. Columbine High School was known to have an intense "jock culture", which saw popular students, mainly athletes, benefit from special treatment from faculty and other students.

According to their journal entries, Harris and Klebold had seemed to begin planning the attack by May 1998, nearly a year before the attack. Throughout the next eleven months, Harris and Klebold meticulously built explosives and gathered an arsenal of weapons. Both Harris and Klebold each left behind several journal writings and home videos, ones they made both alone and together, foreshadowing the massacre and explaining their motives. Harris and Klebold hoped this content would be viewed by the public extensively and inspire followers, although much of the evidence has never been released by authorities.

Harris and Klebold often wore trench coats in school, and in general, as part of their everyday outfits, so after the massacre, it was widely believed Harris and Klebold were part of a clique in school called the "Trenchcoat Mafia", a group of misfits in the school who supposedly rebelled against the popular students. This turned out to be untrue, as neither Harris nor Klebold had any affiliation with the group. The pair's aforementioned writings and videos gave insight into their rationale for the shooting. The FBI concluded that Harris was a psychopath, who exhibited narcissistic traits, unconstrained aggression, and a lack of empathy, while Klebold was concluded to be an angry depressive with a vengeful attitude toward individuals who he believed had mistreated him. However, neither Harris nor Klebold were formally diagnosed with any personality disorders prior to the attack, so this conclusion is often debated. In the following years, various media outlets attributed multiple motivating factors to the attack, including bullying, mental illness, racism, psychiatric medication, and violence in music, movies, and video games. Despite these conclusions, the exact motive for the attack remains inconclusive.

Harris and Klebold have become pop culture icons, with the pair often portrayed, referenced and seen in film, television, video games, music and books. Many killers since the shooting have taken inspiration from the pair (dubbed the Columbine effect), either hailing them as heroes, martyrs and gods, or expressing sympathy for them. Harris and Klebold also have a fanbase, who have coined the term "Columbiners", who write fan fiction and draw fan art of them. Others have also dressed as the duo for cosplay or Halloween.

Eric Harris
Eric David Harris was born on April 9, 1981, in Wichita, Kansas. Harris's parents were both born and raised in Colorado. His mother, Katherine Ann Poole, was a homemaker. His father, Wayne Harris, was working in the United States Air Force as a transport pilot. In 1983, the family moved to Dayton, Ohio, when Harris was two years old. Six years later, the family relocated to Oscoda, Michigan. Michigan pastor William Stone lived across the street from the Harris family while they were located in Oscoda. Stone recalled them as "great neighbors" and often saw Wayne very engaged with his sons. The Harris family then moved to Plattsburgh, New York, in 1991. During his time at Stafford Middle School, Harris played Little League Baseball, regularly went to birthday parties and was "part of the crowd". Kyle Ross, a former classmate of Harris, said, "He was just a typical kid." The Harris family finally settled back in Littleton, Colorado the next year when Wayne retired from the military.

On a 1997 English class assignment, Harris wrote about how difficult the move was from New York to Colorado. "It was the hardest moving from Plattsburgh. I have the most memories from there", Harris continued. "When I left (his friends) I felt alone, lost and even agitated that I had spent so much time with them and now I have to go because of something I can't stop." Harris, in a basement tape, blamed his father for moving the family around, forcing Harris to "start out at the bottom of the ladder." Harris had a chest deformity known as pectus excavatum, in which the breastbone sinks into the chest. This made Harris reluctant to take his shirt off in gym class as other students ridiculed him. Harris had two cosmetic surgeries at age 12 and 13 to repair the deformity. The sunken chest was still mildly observable during his autopsy.

The Harris family lived in rented accommodations for the first three years that they lived in the Littleton area. While Harris was in 7th grade, he met Klebold. In 1996, the Harris family purchased and settled at a house south of Columbine High School. Harris' older brother, Kevin, attended college at the University of Colorado. Harris' father took a job with Flight Safety Services Corporation and Harris' mother became a caterer.

Harris entered Columbine High School in 1995 as a freshman. Columbine had just gone through a major renovation and expansion. From all accounts, he had many friends and was left forward and mid-field on the Columbine soccer team for his freshman and sophomore year. According to one of his teammates, Josh Swanson, he said Harris was a "solid" soccer player, who enjoyed the sport a lot. During his freshman year, Harris met Tiffany Typher. They had German class together. Typher later recounted that Harris quickly wooed her. Harris asked her to homecoming and she accepted. After the event, it appeared that Typher was no longer interested in seeing Harris anymore, for reasons never disclosed. When Typher refused to socialize with Harris again, Harris staged a fake suicide, sprawling on the ground with fake blood splashed all over him. When Typher saw him on the ground, she began to scream for help, at which point Harris and his friends began laughing, prompting Typher to storm off, shouting at Harris to get psychological help.

Dylan Klebold
Dylan Bennet Klebold was born on September 11, 1981, in Lakewood, Colorado, to Thomas and Sue Klebold. On the day after the shooting, Klebold's mother remembered that shortly after Klebold's birth, she described what felt like a shadow cast over her, warning her that this child would bring her great sorrow. "I think I still make of it what I did at that time. It was a passing feeling that went over very quickly, like a shadow." Sue said in an interview with Colorado Public Radio. Klebold was soon diagnosed with pyloric stenosis, a condition in which the opening between the stomach and small intestines thickens, causing severe vomiting during the first few months of life.

Klebold's parents had met when they were both studying art at Ohio State University. After they both graduated, they married in 1971, with their first child, Byron, being born in 1978. Thomas had initially worked as a sculptor, but then moved over to engineering to be more financially stable. Sue had worked in assistance services with disabled children. Furthermore, Klebold's parents were pacifists and attended a Lutheran church with their children. Both Klebold and his older brother attended confirmation classes in accordance with the Lutheran tradition. As had been the case with his older brother, Klebold was named after a renowned poet, Dylan Thomas. Klebold attended Normandy Elementary School for first and second grade and then transferred to Governor's Ranch Elementary School where he was part of the Challenging High Intellectual Potential Students program for gifted children. According to reports, Klebold was exceptionally bright as a young child, although he appeared somewhat sheltered in elementary school. When he transitioned to Ken Caryl Middle School, he found it difficult. Fellow classmates recalled Klebold being painfully shy and quiet, often to an uncomfortable degree. Klebold's parents were unconcerned with the fact that Klebold found the changing of schools uneasy, as they assumed it was just regular behavior among young adolescents. At the family home, the Klebolds also observed some rituals in keeping with Klebold's maternal great-grandfather's Jewish heritage.

During his earlier school years, Klebold played baseball, soccer and T-ball. Klebold was in Cub Scouts with friend Brooks Brown, whom he was friends with since the first grade. Brown lived near the house Harris' parents had bought when they finally settled in Littleton, and rode the same bus as Harris. Shortly after, Klebold had met Harris and the pair quickly became best friends. Later, Harris introduced Klebold to his friend Nathan Dykeman, who also attended their middle school, and they all became a tight-knit group of friends.

Personalities
Both Harris and Klebold worked together as cooks at a Blackjack Pizza, a mile south from Columbine High School. Harris was eventually promoted to shift leader. He and his group of friends were interested in computers, and were enrolled in a bowling class.

Some described Harris as charismatic, and others described him as nice and likable. Harris also often bragged about his ability to deceive others, once stating in a tape that he could make anyone believe anything. By his junior year, Harris was also known to be quick to anger, and threatened people with bombs. Classmates also related that Harris was fascinated by war, and wrote out violent fantasies about killing people he did not like.

Klebold was described by his peers and adults as painfully shy. Klebold often was fidgety whenever someone new talked to him, rarely opening up to people. Klebold was also exceptionally nervous in front of the opposite sex, sometimes avoiding a confrontation with girls altogether. In the last year of his life, many noted a change in Klebold's behavior. Unlike before, Klebold became short-tempered, often prone to sudden outbursts of anger.

Friendship
Much of the information on Harris and Klebold's friendship is unknown, on their interactions and conversations, aside from the Basement Tapes, of which only transcripts have been released, aside from a short audio clip recorded surreptitiously by a victim's father. The pair claimed they were going to make copies of the tapes to send to news stations, but never did so. Harris and Klebold met at Ken Caryl Middle School during their seventh grade year. Over time, they became increasingly close, hanging out by often going out bowling, carpooling and playing the video game Doom over a private server connected to their personal computers. By their junior year of high school, the boys were described as inseparable. Chad Laughlin, a close friend of Harris and Klebold, said that they always sat alone together at lunch and often kept to themselves.

A rumor eventually started that Harris and Klebold were gay and romantically involved, due to the time the pair spent together. It is unknown if they were aware of this rumor. Judy Brown believed Harris was more emotionally dependent on Klebold, who was more liked by the broader student population. In his journals, however, Klebold wrote that he felt that he was not accepted or loved by anyone. Due to these feelings, Klebold possibly sought validation from Harris. Klebold's mother believes Harris' rage, intermingled with Klebold's self-destructive personality, caused the boys to feed off of each other and enter in what eventually became an unhealthy friendship.

Columbine High School
At Columbine High School, Harris and Klebold were active in school play productions, operated video productions and became computer assistants, maintaining the school's computer server. According to early accounts of the shooting, they were very unpopular students and targets of bullying. While sources do support accounts of bullying specifically directed toward Harris and Klebold,  accounts of them being outcasts have been reported to be false, since both of them had a close knit group of friends.

Harris and Klebold were initially reported to be members of a clique that was called the "Trenchcoat Mafia", despite later confirmation that the pair had no connection to the group and furthermore did not appear in the group's photo in Columbine High's 1998 yearbook. Harris' father erroneously stated that his son was "a member of what they call the Trenchcoat Mafia" in a 9-1-1 call he made on the day of the shooting. Klebold attended the high school prom three days before the shootings with a classmate named Robyn Anderson.

Harris and Klebold linked their personal computers on a network and played video games over the Internet. Harris created a set of levels for the game Doom, which later became known as the "Harris levels". The levels are downloadable over the internet through Doom WADs. Harris had a web presence under the handle "REB" (short for Rebel, a nod to the nickname of Columbine High's sports teams) and other online aliases, including "Rebldomakr", "Rebdoomer", and "Rebdomine". Klebold went by the names "VoDKa" and "VoDkA", after the alcoholic beverage. Harris had various websites that hosted Doom and Quake files, as well as team information for those with whom he gamed online. The sites openly espoused hatred for people in their neighborhood and the world in general. When the pair began experimenting with pipe bombs, they posted results of the explosions on the websites. The website was shut down by America Online after the shootings and was preserved for the FBI.

Initial criminal activity
On the night of January 30, 1998, Harris and Klebold broke into a locked van to steal computers and other electronic equipment. A short while after a Jefferson County sheriff's officer drove upon the two boys parked further down road at another park entrance and since the park area was closed by that time of night, the arresting deputy decided to further inspect them. The deputy announced his presence as one of the boys prepared to move the stolen goods into the trunk of the car. Harris shortly after admitted to theft after the deputy asked about where the equipment came from. They were later charged with mischief, breaking and entering, trespassing, and theft. They both left good impressions on juvenile officers, who offered to expunge their criminal records if they agreed to attend a diversionary program which included community service and psychiatric treatment. Harris was required to attend anger management classes where, again, he made a favorable impression. The boys' probation officer discharged them from the program a few months ahead of schedule for good behavior. Regarding Harris, it was remarked that he was "a very bright individual who is likely to succeed in life", while Klebold was said to be intelligent, but "needs to understand that hard work is part of fulfilling a dream."

Several months later on April 30, Harris handed over the first version of a letter of apology he wrote to the owner of the van, which he completed the next month. In the letter, Harris expressed regret about his actions; however, in one of his journal entries dated April 12, he wrote: "Isn't america supposed to be the land of the free? how come, If im free, I cant deprive some fucking dumbshit from his possessions If he leaves them sitting in the front seat of his fucking van in plain sight in the middle of fucking nowhere on a fri-fucking-day night? Natural selection. Fucker should be shot. [sic]".

Hitmen for Hire
When an economics class had Harris make an ad for a business, he and Klebold made a video called Hitmen for Hire on December 8, 1998, which was released in February 2004. It depicts them as part of the Trench Coat Mafia, a clique in the school who wore black trench coats, extorting money for protecting preps from bullies. They were apparently not a part of the Trench Coat Mafia, but were friends with some of its members. They wore black trench coats on the day of the massacre, and the video seemed a kind of dress rehearsal, showing them walking the halls of the school, and shooting bullies outside with fake guns.

Both also displayed themes of violence in their creative writing projects; of a Doom-based story written by Harris on January 17, 1999, Harris' teacher said: "Yours is a unique approach and your writing works in a gruesome way — good details and mood setting."

Acquiring arms
Harris and Klebold were unable to legally purchase firearms due to their both being underage at the time. Klebold then enlisted Robyn Anderson, an 18-year-old Columbine student and old friend of Klebold's, to make a straw purchase of two shotguns and a Hi-Point carbine for the pair. In exchange for her cooperation with the investigation that followed the shootings, no charges were filed against Anderson. After illegally acquiring the weapons, Klebold sawed off his Savage 311-D 12-gauge double-barrel shotgun, shortening the overall length to approximately 23 in. Meanwhile, Harris's Savage-Springfield 12-gauge pump shotgun was sawn off to around 26 in.

The shooters also possessed a TEC-DC9 semi-automatic handgun, which had a long history. The manufacturer of the TEC-DC9 first sold it to Miami-based Navegar Incorporated. It was then sold to Zander's Sporting Goods in Baldwin, Illinois, in 1994. The gun was later sold to a firearms dealer, Larry Russel, in Thornton, Colorado. In violation of federal law, Russell failed to keep records of the sale, yet he determined that the purchaser of the gun was twenty-one years of age or older. Two men, Mark Manes and Philip Duran, were convicted of supplying weapons to the two.

The bombs used by the pair varied and were crudely made from carbon dioxide canisters, galvanized pipe, and metal propane bottles. The bombs were primed with matches placed at one end. Both had striker tips on their sleeves. When they rubbed against the bomb, the match head lit the fuse. The weekend before the shootings, Harris and Klebold had purchased propane tanks and other supplies from a hardware store for a few hundred dollars. Several residents of the area claimed to have heard glass breaking and buzzing sounds from the Harris family's garage, which later was concluded to indicate they were constructing pipe bombs.

More complex bombs, such as the one that detonated on the corner of South Wadsworth Boulevard and Ken Caryl Avenue, had timers. The two largest bombs built were found in the school cafeteria and were made from small propane tanks. Only one of these bombs went off, only partially detonating. It was estimated that if any of the bombs placed in the cafeteria had detonated properly, the blast could have caused extensive structural damage to the school and would have resulted in hundreds of casualties.

Massacre


On April 20, 1999, just weeks before Harris and Klebold were both due to graduate, Brooks Brown, who was smoking a cigarette outside during lunch break, saw Harris arrive at school. Brown had severed his friendship with Harris a year earlier after Harris had thrown a chunk of ice at his car windshield. Brown reconciled with Harris just prior to the shooting. Brown approached Harris near his car and scolded him for skipping his morning classes, because Harris was always serious about schoolwork and being on time. Harris replied, "It doesn't matter anymore." Harris followed up a few seconds later, "Brooks, I like you now. Get out of here. Go home." Brown, who felt uneasy, quickly left the school grounds. At 11:19 am, he heard the first gunshots after he had walked some distance away from the school, and informed the police via a neighbor's cell phone.

By that time, Klebold had already arrived at the school in a separate car, and the two boys left two duffel bags, each containing a 20-pound propane bomb, inside the cafeteria. Their original plans indicated that when these bombs detonated, Harris and Klebold would be waiting at their cars and would shoot, stab and throw bombs at survivors of the initial explosion as they ran out of the school. At noon, this would be followed by bombs set up in their personal cars detonating, killing first responders and others on scene. When these devices failed to detonate, Harris and Klebold resorted to gunning down their classmates and teachers. It was the deadliest high school shooting in U.S history until it was surpassed by the Stoneman Douglas High School shooting committed by Nikolas Cruz on February 14, 2018. Harris was responsible for eight of the thirteen confirmed deaths (Rachel Scott, Daniel Rohrbough, teacher Dave Sanders, Steve Curnow, Cassie Bernall, Isaiah Shoels, Kelly Fleming, and Daniel Mauser), while Klebold was responsible for the remaining five (Kyle Velasquez, Matthew Kechter, Lauren Townsend, John Tomlin, and Corey DePooter). There were 24 injured (21 of them by the shooters), most in critical condition.

Suicide
At 12:02 pm, Harris and Klebold returned to the library. Of the 56 library hostages, 34 remained unharmed, all of whom escaped after Harris and Klebold left the library initially. Investigators later found that Harris and Klebold had enough ammunition to have killed them all. This was 20 minutes after their lethal shooting spree had ended, leaving 12 students dead, one teacher dying, and another 24 students and staff injured. Ten of their victims had been killed in the library. It is believed they came back to the library to watch their car bombs detonate, which had been set up to explode at noon. This did not happen, as the aforementioned bombs failed. Harris and Klebold went to the west windows and opened fire on the police outside. No one was injured in the exchange. Between three and six minutes later, they walked to the bookshelves near a table where Patrick Ireland lay badly wounded and coming in and out of consciousness. Student Lisa Kreutz, injured in the earlier library attack, was also in the room, unable to move.

By 12:08 pm, Harris and Klebold had killed themselves. In a subsequent interview, Kreutz recalled hearing a comment such as, "You in the library", around this time. Harris sat down with his back to a bookshelf and fired his shotgun through the roof of his mouth; Klebold went down on his knees and shot himself in the left temple with his TEC-9. An article by The Rocky Mountain News stated that Patti Nielson overheard them shout "One! Two! Three!" in unison, just before a loud boom. Nielson said that she had never spoken with either of the writers of the article, and evidence suggests otherwise. Just before shooting himself, Klebold lit a Molotov cocktail on a nearby table, underneath which Ireland was lying, which caused the tabletop to momentarily catch fire. Underneath the scorched film of material was a piece of Harris's brain matter, suggesting Harris had shot himself by this point.

Suggested rationales


There was controversy over whether Harris and Klebold should be memorialized. Some were opposed, saying that it glorified murderers, while others argued that Harris and Klebold were also victims. Atop a hill near Columbine High School, crosses were erected for Harris and Klebold along with those for the people they killed, but the father of victim Daniel Rohrbough cut them down, saying that murderers should not be memorialized in the same place as victims.

Overview
Harris and Klebold wrote some about how they would carry out the massacre, and less about why. Klebold penned a rough outline of plans to follow on April 20, and another slightly different one in a journal found in Harris's bedroom. In one entry on his computer, Harris referenced the Oklahoma City bombing, and they mentioned their wish to outdo it by causing the most deaths in US history. They also mentioned how they would like to leave a lasting impression on the world with this kind of violence. Much speculation occurred over the date chosen for their attack. The original intended date of the attack may have been April 19; Harris required more ammunition from Mark Manes, who did not deliver it until the evening of April 19.

Harris and Klebold were both avid fans of KMFDM, an industrial band led by German multi-instrumentalist Sascha Konietzko. It was revealed that lyrics to KMFDM songs ("Son of a Gun", "Stray Bullet" and "Waste") were posted on Harris' website, and that the date of the massacre, April 20, coincided with both the release date of the album Adios and the birthday of Adolf Hitler. Harris noted the coincidence of the album's title and April release date in his journal. In response, KMFDM's Konietzko issued a statement that KMFDM was "against war, oppression, fascism and violence against others" and that "none of us condone any Nazi beliefs whatsoever".

An April 22, 1999, article in The Washington Post described Harris and Klebold:

"They hated jocks, admired Nazis and scorned normalcy. They fancied themselves devotees of the Gothic subculture, even though they thrilled to the violence denounced by much of that fantasy world. They were white supremacists, but loved music by anti-racist rock bands."

The attack occurred on Hitler's birthday, which led to speculation in the media. Some people, such as Robyn Anderson, who knew the perpetrators, stated that the pair were not obsessed with Nazism nor did they worship or admire Hitler in any way. Anderson stated, in retrospect, that there were many things the pair did not tell friends. In his journal, Harris mentioned his admiration of what he imagined to be natural selection, and wrote that he would like to put everyone in a super Doom game and see to it that the weak die and the strong live. On the day of the massacre, Harris wore a white T-shirt with the words "Natural selection" printed in black.

Bullying
At the end of Harris' last journal entry, he wrote: "I hate you people for leaving me out of so many fun things. And no don't fucking say, 'Well that's your fault,' because it isn't, you people had my phone number, and I asked and all, but no. No no no don't let the weird-looking Eric KID come along, ooh fucking nooo." However, in another entry by Eric in his journal, he stated that even if he were complimented and respected more by his peers, the attack would've still, in all likelihood, occurred.

Similarly, Klebold wrote in his journal both about perceived rejection, bullying others, his desire to belong, and his extreme contempt for others. In January 1997, he wrote, "I am GOD compared to some of those un-existable [sic] brainless zombies," referring to his perception of the morons of the world. In March 1997, he wrote, "I do shit to supposedly ‘cleanse’ myself in a spiritual, moral sort of way... trying not to ridicule/make fun of people ([name omitted] at school), yet it does nothing to help my life morally."

Klebold said on the Basement Tapes, "You've been giving us shit for years. You're fucking gonna pay for all the shit! We don't give a shit. Because we're gonna die doing it." However, they also stated on the tapes that nobody is to blame and nobody could have prevented the attack.

Accounts from various parents and school staffers describe bullying at the school as "rampant". Nathan Vanderau, a friend of Klebold, and Alisa Owen, Harris's eighth-grade science partner, reported that Harris and Klebold were constantly picked on. Vanderau noted that a "cup of fecal matter" was thrown at them. "People surrounded them in the commons and squirted ketchup packets all over them, laughing at them, calling them faggots", Brooks Brown says. "That happened while teachers watched. They couldn't fight back. They wore the ketchup all day and went home covered with it." In his book No Easy Answers: The Truth Behind Death at Columbine, Brown wrote that Harris was born with mild chest indent. This made him reluctant to take his shirt off in gym class, and other students would laugh at him.

"A lot of the tension in the school came from the class above us", Chad Laughlin states. "There were people fearful of walking by a table where you knew you didn't belong, stuff like that. Certain groups certainly got preferential treatment across the board. I caught the tail end of one really horrible incident, and I know Dylan told his mother that it was the worst day of his life." That incident, according to Laughlin, involved seniors pelting Klebold with "ketchup-covered tampons" in the commons. However, other commentators have disputed the theory that bullying was the motivating factor. Jeff Kass who has also published a book on the attack believes that bullying wasn't the cause. Peter Langman also argues against bullying being the cause of the attack. Other researchers have concurred.

Journals and investigation
Harris began keeping a journal in April 1998, a short time after the pair was charged with breaking into a van, for which each received ten months of juvenile intervention counseling and community service in January 1998. They began to formulate plans then, as reflected in their journals.

Harris wanted to join the United States Marine Corps, but his application was rejected shortly before the shootings because he was taking the drug fluvoxamine, an SSRI antidepressant, which he was required to take as part of court-ordered anger management therapy. Harris did not state in his application that he was taking any medications. According to the recruiting officer, Harris did not know about this rejection. Though some friends of Harris suggested that he had stopped taking the drug beforehand, the autopsy reports showed low therapeutic or normal (not toxic or lethal) blood-levels of fluvoxamine in his system, which was around 0.0031–0.0087 mg/ml, at the time of death. After the shootings, opponents of contemporary psychiatry like Peter Breggin claimed that the psychiatric medications prescribed to Harris after his conviction may have exacerbated his aggressiveness.

Klebold entitled his journal A Virtual Book: EXISTENCES. Klebold's first journal entry was March 31, 1997, over a year prior to when Harris began his own writings, and in it, he talks about his depression and suicidal thoughts, over two years prior to the massacre. For the rest of his writings, Klebold often wrote about his view that he and Harris were "god-like" and more highly evolved than every other human being, but his secret journal records the aforementioned self-loathing and suicidal intentions. Page after page was covered in hearts, as he was secretly in love with a Columbine student. Although both had difficulty controlling their anger, Klebold's anger had led to his being more prone to serious trouble than Harris. After their arrest, which both recorded as the most traumatic thing they had ever experienced, Klebold wrote a letter to Harris, saying how they would have so much fun getting revenge and killing police, and how his wrath from the January arrest would be "god-like". On the day of the massacre, Klebold wore a black T-shirt which had the word "WRATH" printed in red. It was speculated that revenge for the arrest was a possible motive for the attack, and that the pair planned on having a massive gun battle with police during the shooting. Klebold wrote that life was no fun without a little death, and that he would like to spend the last moments of his life in nerve-wracking twists of murder and bloodshed. He concluded by saying that he would kill himself afterward in order to leave the world that he hated and go to a better place. Klebold was described as being "hotheaded, but depressive and suicidal".

Some of the home-recorded videos, called "The Basement Tapes", have reportedly been destroyed by police. Harris and Klebold reportedly discussed their motives for the attacks in these videos and gave instructions in bomb making. Police cite the reason for withholding these tapes as an effort to prevent them from becoming "call-to-arms" and "how-to" videos that could inspire copycat killers. Some people have argued that releasing the tapes would be helpful, in terms of allowing psychologists to study them, which in turn could possibly help identify characteristics of future killers.

Media accounts
Initially, the shooters were believed to be members of a clique that called themselves the "Trench Coat Mafia", a small group of Columbine's self-styled outcasts who wore heavy black trench coats. Early reports described the members as also wearing German slogans and swastikas on their clothes. Additional media reports described the Trench Coat Mafia as a cult with ties to the neo-Nazi movement which fueled a media stigma and bias against the Trench Coat Mafia. The Trench Coat Mafia was a group of friends who hung out together, wore black trench coats, and prided themselves on being different from the 'jocks' who had been bullying the members and who also coined the name Trench Coat Mafia. The trench coat inadvertently became the members' uniform after a mother of one of the members bought it as a present.

Investigation revealed that Harris and Klebold were only friends with one member of the group, Kristin Thiebault, and that most of the primary members of the Trench Coat Mafia had left the school by the time that Harris and Klebold committed the massacre. Most did not know the shooters, apart from their association with Thiebault, and none were considered suspects in the shootings or were charged with any involvement in the incident.

Marilyn Manson was blamed by the media in the wake of the Columbine shooting, and responded to criticism in an interview with Michael Moore, in which he was asked, "If you were to talk directly to the kids at Columbine and the people in the community, what would you say to them if they were here right now?", to which he replied, "I wouldn't say a single word to them—I would listen to what they have to say, and that's what no one did", referring to people ignoring red flags that rose from Harris and Klebold prior to the shooting.

Psychological analysis
Although early media reports attributed the shootings to a desire for revenge on the part of Harris and Klebold for bullying that they received, subsequent psychological analysis indicated Harris and Klebold harbored serious psychological problems. Harris and Klebold were never diagnosed with any mental disorders, which is overwhelmingly uncommon in mass shooters. According to Supervisory Special Agent Dwayne Fuselier, the FBI's lead Columbine investigator and a clinical psychologist, Harris exhibited a pattern of grandiosity, contempt, and lack of empathy or remorse, distinctive traits of psychopaths that Harris concealed through deception. Fuselier adds that Harris engaged in mendacity not merely to protect himself, as Harris rationalized in his journal, but also for pleasure, as seen when Harris expressed his thoughts in his journal regarding how he and Klebold avoided prosecution for breaking into a van. Other leading psychiatrists concur that Harris was a psychopath.

According to psychologist Peter Langman, Klebold displayed signs of schizotypal personality disorder – he struck many people as odd due to his shy nature, appeared to have had disturbed thought processes and constantly misused language in unusual ways as evidenced by his journal. He appeared to have been delusional, viewed himself as "god-like", and wrote that he was "made a human without the possibility of BEING human." He was also convinced that others hated him and felt like he was being conspired against, even though according to many reports, Klebold was loved by his family and friends.

Lawsuits
In April 2001, the families of more than 30 victims were given shares in a $2,538,000 settlement by the families of the perpetrators, and the two men convicted of supplying the weapons used in the massacre. The Harrises and the Klebolds contributed $1,568,000 to the settlement from their own homeowners' policies, Manes contributed $720,000, and Duran contributed $250,000. The Harrises and the Klebolds were ordered to guarantee an additional $32,000 be available against any future claims. Manes was ordered to hold $80,000 against future claims, and Duran was ordered to hold $50,000.

One family had filed a $250-million lawsuit against the Harrises and Klebolds in 1999 and did not accept the 2001 settlement terms. A judge ordered the family to accept a $366,000 settlement in June 2003. In August 2003, the families of five other victims received undisclosed settlements from the Harrises and Klebolds.

Reaction of Sue Klebold
Sue Klebold, mother of Dylan Klebold, initially was in denial about Klebold's involvement in the massacre, believing he was tricked by Harris into doing it, among other things. Six months later, she saw the Basement Tapes made by Harris and Klebold and acknowledged that Klebold was equally responsible for the killings. She spoke about the Columbine High School massacre publicly for the first time in an essay that appeared in the October 2009 issue of O: The Oprah Magazine. In the piece, Klebold wrote: "For the rest of my life, I will be haunted by the horror and anguish Dylan caused", and "Dylan changed everything I believed about myself, about God, about family, and about love." Stating that she had no clue of her son's intentions, she said: "Once I saw his journals, it was clear to me that Dylan entered the school with the intention of dying there." In Andrew Solomon's 2012 book Far from the Tree, she acknowledged that on the day of the massacre, when she discovered that Klebold was one of the shooters, she prayed he would kill himself (before committing mass murder). "I had a sudden vision of what he might be doing. And so while every other mother in Littleton was praying that her child was safe, I had to pray that mine would die before he hurt anyone else."

In February 2016, Klebold published a memoir, titled A Mother's Reckoning, about her experiences before and after the massacre. It was co-written by Laura Tucker and included an introduction by National Book Award winner Andrew Solomon. It received very favorable reviews, including from the New York Times Book Review. It peaked at No. 2 on The New York Times Best Seller list.

On February 2, 2017, Klebold posted a TED Talk titled, "My son was a Columbine shooter. This is my story." As of January 2024, the video has over 12.1 million views. The site listed Klebold's occupation as "activist", and stated: "Sue Klebold has become a passionate agent working to advance mental health awareness and intervention."

Legacy
ITV describes the legacy of Harris and Klebold as deadly, as they have inspired several instances of mass killings in the United States and globally. Napa Valley Register have called the pair "cultural icons". Author of Columbine, Dave Cullen, called Harris and Klebold the fathers of the movement for disenfranchised youth. Harris and Klebold have also, as CNN referred to, left their inevitable mark on pop culture.

Copycats
The Columbine shooting influenced several subsequent school shootings, with many praising Harris and Klebold, referring to them as martyrs, heroes or gods. In some cases, it has led to the closure of entire school districts. According to psychiatrist E. Fuller Torrey of the Treatment Advocacy Center, a legacy of the Columbine shootings is its "allure to disaffected youth".

Ralph Larkin examined twelve major school shootings in the US in the following eight years and found that in eight of those, "the shooters made explicit reference to Harris and Klebold." Larkin wrote that the Columbine massacre established a "script" for shootings. "Numerous post-Columbine rampage shooters referred directly to Columbine as their inspiration; others attempted to supersede the Columbine shootings in body count."

A 2015 investigation by CNN identified "more than 40 people ... charged with Columbine-style plots." A 2014 investigation by ABC News identified "at least 17 attacks and another 36 alleged plots or serious threats against schools since the assault on Columbine High School that can be tied to the 1999 massacre." Ties identified by ABC News included online research by the perpetrators into the Columbine shooting, clipping news coverage and images of Columbine, explicit statements of admiration of Harris and Klebold, such as writings in journals and on social media, in video posts, and in police interviews, timing planned to an anniversary of Columbine, plans to exceed the Columbine victim counts, and other ties. 60 mass shootings have been carried out, where the perpetrators had made at least a single reference to Harris and Klebold.

In 2015, journalist Malcolm Gladwell writing in The New Yorker magazine proposed a threshold model of school shootings in which Harris and Klebold were the triggering actors in "a slow-motion, ever-evolving riot, in which each new participant's action makes sense in reaction to and in combination with those who came before."

Fandom
Harris and Klebold have also spawned a fandom who call themselves "Columbiners", mostly apparent on blogging site Tumblr. While some just have a scholarly interest in the pair or the event, the vast majority of these individuals, mostly young women, express a sympathetic, or sometimes even sexual interest, in Harris and Klebold. There has been homoerotic art drawn of the two, fan fiction created on the pair's future together had they not gone through with the shooting and costumes created on the outfits Harris and Klebold sported the day of the shootings.

"I relate to their feelings of hopelessness, being angry and not being able to change it, and wanting to be accepted and appreciated", an 18-year-old Tumblr user wrote on Harris and Klebold. "No one noticed they were struggling, and no one took their suffering seriously", added another user. A news site called "All That's Interesting" said on the fandom, "Many of these Columbiners have no positive feelings about the massacre, but are instead focused on the troubled inner lives of its perpetrators because they see themselves in them." The fandom has received criticism for heroizing Harris and Klebold and allegedly inspiring shooting plots such as the Halifax mass shooting plot.

Media about the duo
The 2002 Michael Moore documentary film Bowling for Columbine focuses heavily on a perceived American obsession with handguns, its grip on Jefferson County, Colorado, and its role in the shooting.

In 2004, the shooting was dramatized in the documentary Zero Hour, in which Harris and Klebold are played by Ben Johnson and Josh Young, respectively.

In 2005, game designer Danny Ledonne created a role-playing video game where the player assumes the role of Harris and Klebold during the massacre, entitled Super Columbine Massacre RPG!. The game received substantial media backlash for allegedly glorifying the pair's actions. The father of one victim remarked to the press that the game "disgusts me. You trivialize the actions of two murderers and the lives of the innocent."

The 2016 biographical film I'm Not Ashamed, based on the journals of Rachel Scott, includes glimpses of Harris's and Klebold's lives and of interactions between them and other students at Columbine High School. Harris is played by David Errigo Jr. and Klebold is played by Cory Chapman.

Fiction inspired by the duo
The 2003 Gus Van Sant film Elephant depicts a fictional school shooting, some of whose details were based on the Columbine massacre, such as one scene in which one of the young killers walks into the evacuated school cafeteria and pauses to take a sip from a drink left behind, as Harris did during the shooting. In the film, the killers are called "Alex and Eric" after the actors who portray them, Alex Frost and Eric Deulen.

In the 2003 Ben Coccio film Zero Day, which was inspired by the Columbine shooting, two shooters are played by Andre Kriegman and Cal Gabriel and called "Andre and Calvin" after their actors.