District of Columbia City Hall Scott Key, (1779–1843), and was sentenced to a mental institution. The building was also the site of the 1867 trial of John Surratt, an alleged conspirator in the assassination of Abraham Lincoln who was later acquitted. However, Charles J. Guiteau, the assassin of President James A. Garfield, was convicted at the courthouse in 1882. The Old City Hall was the scene of a fugitive slave trial known as the "Pearl incident," which was the largest single escape by slaves attempted in U.S. history. Two men were convicted in 1848 of attempting to free more than 70 slaves by sailing them
Charles J. Guiteau convinced that his actions were divinely inspired, and that his destiny was to "preach a new Gospel" like Paul the Apostle. Guiteau then obtained a law license in Chicago; however, he was not successful as a lawyer. He argued only one case in court, the bulk of his business being in bill collecting. His former wife later detailed his dishonest dealings, describing how he would keep disproportionate amounts from his collections and rarely give the money to his clients. He next turned to theology. He published a book on the subject called "The Truth" which was almost entirely plagiarized from