1798 Bank of Pennsylvania heist

The 1798 Bank of Pennsylvania heist was the robbery of $162,821 (over $ today) on the night between August 31 and September 1, 1798 from the Bank of Pennsylvania at Carpenters' Hall in Philadelphia, Pennsylvania by Isaac Davis and Thomas Cunningham. It is notable as the first major bank robbery in the United States.

Crime
The bank showed no signs of forced entry and the vault was believed to have been opened with a forged key.

False imprisonment of Pat Lyon
Patrick Lyon, a blacksmith who had forged the vault doors and fitted the locks just weeks before the robbery, was initially a suspect in the heist. However, Lyon had left Philadelphia for Lewes, Delaware on August 26, 1798 to escape a yellow fever epidemic. Lyon returned to Philadelphia to plead his case but he was imprisoned anyways; constable John Haines wanted to collect the $2,000 reward. Lyon spent three months in Walnut Street Jail, much of it in solitary confinement, where he did contract yellow fever and almost died. His bail was set at $150,000, almost the entire amount that was stolen.

Perpetrators
The sole perpetrators of the heist, Isaac Davis, a member of the Carpenters' Company, the guild that owned the building, and Thomas Cunningham, a porter at the bank, were later caught. Cunningham died of yellow fever several days after the heist. Davis, who had visited Lyon's shop while he was forging the doors, aroused suspicion after depositing the stolen money in several banks, including the one he had burglarized, and he later confessed to the heist. However, in a corrupt deal brokered by Davis's uncle, Benjamin Brannon, a powerful judge, Davis was pardoned by the Governor of Pennsylvania without serving any jail time after he gave back the stolen money in a plea bargain.

Aftermath
Lyon was cleared by a grand jury in January 1799. Lyon wrote a book on his false imprisonment titled Narrative of Patrick Lyon Who Suffered Three Months Severe Imprisonment in Philadelphia Gaol on Merely a Vague Suspicion of Being Concerned in a Robbery of the Bank of Pennsylvania With his Remarks Thereon, published in 1799. He sued the president of the Bank of Pennsylvania, two other bank officials, the city constable and an alderman for damages over false imprisonment. Lyon was represented by Alexander J. Dallas. In 1805, after a 4-hour deliberation by a jury, Lyon was awarded $12,000 ($ today) for false imprisonment; in 1807, an appeal by the defendants was settled out of court for $9,000 ($ today).

Using the funds from his settlement payment, Lyon commissioned a portrait of himself painted by John Neagle, titled Pat Lyon at the Forge, depicting Lyon standing at a forge with the cupola of the Walnut Street Prison visible in the background.