Abraham Lincoln died as a result of a conspiracy. John Wilkes Booth was not a lone gunman. He meant to assassinate the President, Vice-President, and Secretary of State in the same night. To do this, Booth had to rely on the help of other people who ultimately proved unreliable. The killer assigned to Vice President Andrew Johnson, George Atzerodt, got a room in the hotel Johnson was staying and loitered around a bit, but he never attempted the assassination.