In January 1865, some years after opening his failed carriage repair business, Atzerodt was introduced to
John Wilkes Booth in
Washington, D.C., by
John Surratt. Atzerodt was willing to join in Booth's earlier conspiracy to kidnap
President Abraham Lincoln, as he later admitted in his trial. According to the prosecution, Booth assigned Atzerodt to assassinate
Vice President Andrew Johnson on April 14, 1865. On that morning, Atzerodt booked room 126 at the
Kirkwood House in Washington, where Johnson was staying. At 10:15 P.M. that night, the same moment John Wilkes Booth shot Abraham Lincoln at
Ford's Theater,
Lewis Powell attacked the already injured Secretary of State
William Seward, but Atzerodt could not muster the courage to kill Andrew Johnson. Instead, he began drinking at the hotel bar, becoming heavily intoxicated, and lost his nerve. He spent the rest of the night drunkenly walking the streets of Washington. He dropped his knife in a nearby gutter; a sharp-eyed woman saw this and reported it to the police immediately. During his stay at the hotel, Atzerodt had asked the bartender about Johnson's whereabouts. That aroused suspicion the next day, after Lincoln was assassinated. An employee of the hotel contacted the police regarding a "suspicious looking man in a gray coat". The
military police then conducted a search of Atzerodt's room on April 15 and found that he had not slept in it the night before. Additionally, he had a loaded
revolver concealed under his pillow as well as a concealed
Bowie knife. The police also found a bank book belonging to Booth in the room. Atzerodt was arrested on April 20, at the house of his cousin, Hartman Richter, in
Germantown, Maryland. ==Trial and execution==