On page 41 of Chasing Lincoln Killer by James Swanson Lincoln is shot we know this by the phrases,"The bullet struck him in the head, on the lower left side, just below the ear.", "penetrated the skull, and because of the angle of Lincoln's head at the moment of impact, made a diagonal tunnel through Lincolns brain.", "The ball came to rest in Lincoln's brain, behind his right eye." And also because of the picture on page 40. This leads to Booths death by him shooting the president.