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Evidence collection https://thefutureofthings.com/10468-5-important-tools-used-forensic-scientists/

https://www.crime-scene-investigator.net/evidenc3.html

The development of forensics has improved the level of crimes being solved. Whenever first responders respond to crime scenes they are with people of different expertise. These people have different tools that allow them to collect evidence.There is trace evidence such as hairs,soil, fingerprints,footprints, shoe prints, gunpowder residue, glass fragments, carpet fibers, and similar items that are vital to crime scene processing. Depending on the crime scene, determines what technicians will be needed to respond to the scene

Chromatography is a science that separates mixtures to their original compound and allows for them to be identified. This is useful when trying to determine whether someone died a natural death or was poisoned. Depending on the evidence collected determines the procedure that will be used- thin layer, gas, or paper chromatography which are specific ways to separate compounds.

Fingerprints (which also includes palm prints and footprints) are another type of evidence that can tie individuals to crime scenes. Collecting fingerprints is a crucial process and should be one of the first things conducted when investigators arrive at the crime scene. If a print is not able to be lifted then photographs of the prints are acceptable.

Types of crime scenes

Different types of crime scenes include outdoors, indoor, and conveyance. Outdoor crime scenes are the most difficult to investigate. The exposure to elements such as rain, wind, or heat, as well as animal activity, contaminates the crime scene and leads to the destruction of evidence.Other factors such as not properly securing the crime scene can lead to contamination of evidence. If a crime were committed outdoors and indoors then the outdoor crime scene is priority. It is very difficult to process outdoor crime scenes at night. Regardless of lighting used to enhance visibility it is detrimental to the evidence. This can cause for loss and destruction of evidence, therefore if at all possible it is best to preserve a crime scene for daylight processing. . Indoor crime scenes have a significantly lower chance of contamination because of the lack of exposure. The contamination here usually comes from the people factor. Conveyance crime scenes are crimes committed by means of transportation, such as robbery, grand theft,car jacking,sexaul battery, and homicide. Each type of crime scene, along with the nature of the crime committed (robbery, homicide, rape, etc.) have different procedures. When conveyance crime scenes are being investigated it is important to look beyond the conveyance itself. An example of this would be footprints or shoe impressions of someone fleeing a scene and the track of could leave evidence that the suspect pick up at the scene, such as soil, rocks, sand and etc.  https://www.all-about-forensic-science.com/types-of-crime-scene.html

Documentation of crime sceneshttps://www.forensicmag.com/article/2016/02/crime-scene-documentation-start-finish

Sequence of events https://www.nist.gov/sites/default/files/documents/forensics/Crime-Scene-Investigation.pdf

Reconstruction https://www.crimesceneinvestigatoredu.org/crime-scene-reconstructionist/ 

Crime scene reconstruction uses the scientific method physical evidence, inductive and deductive reasoning to help understand a series in which the crimes happened. Crime scene reconstruction helps aid in the arrest of suspects and prosecute the in the court of law. Crime scene reconstruction is more than crime scene reenactment it involves more of a comprehensive approach and dedicated to finding a final resolution. Crime scene reconstruction help put pieces of a case together. The steps to crime scene reconstruction involve: the initial walk-through and examination of the crime scene, organizing an approach for collecting evidence, formulate theory, use the theory to track down suspects, reconciling all evidence that refutes the hypothesis or creates one.