After the assassination the police were arresting people who knew anyone that had a part in the assassination plot or knew anything about it. Mary Surratt was one person who knew some of the people involved in the assassination. She did not know details of the plot, but did know they were planning on kidnapping Lincoln. She kept this information to herself and did not tell anyone because her son, John Surratt, was also a conspirator. John Surratt was afraid of