Mary Surratt should have been executed because she lied to the authorities. Mary lied to the authorities about knowing the people who shot Lincoln. Mary is guilty for Lincoln assassination because she was involved with the people who killed Lincoln and gave them weapons. In source 3, it says “I want you to have those shooting irons ready.” That meant that she had weapons and told the people who shot Lincoln to get them ready. It also says, “Mary Surratt has ordered Lloyd to get ready that afternoon.” That means that Mary ordered Lloyd to get ready for the shooting irons. Mary is guilty because people were doing her dirty work. Source 3, it states, “He said he was there to see Mrs. Surratt”, “a large powerful man holding a pickaxe.”