David Herold — An impressionable and dull-witted pharmacy clerk, Herold accompanied Booth to the home of Dr. Samuel Mudd, who set Booth’s injured leg. The two men then continued their escape through Maryland and into Virginia, and Herold remained with Booth until the authorities cornered them in a barn. Herold surrendered but Booth was shot and died a few hours later.

Lewis Powell — Powell was a former Confederate prisoner of war. Tall and strong, he was recruited to provide the muscle for the kidnapping plot. When that plan failed, Booth assigned Powell to kill Secretary of State William Seward. He entered the Seward home and severely injured Seward, Seward’s son, and a bodyguard.

Mary Surratt — Surratt owned a boarding house in Washington where the conspirators met. Sentenced to death, she was hanged, becoming the first woman executed by the United States federal government.

George Azterodt — German-born Azterodt was a carriage painter and boatman who had secretly ferried Confederate spies across Southern Maryland waterways during the war. Recruited by Booth into the conspiracy, he was assigned to kill Vice President Andrew Johnson, but lost his nerve and stayed in a hotel bar, drinking, instead.