You don’t know his name, but you know who he is. He’s one of three people in the foreground of one of the most famous photos in American history.
Leavelle is the man in the light-colored suit escorting Lee Harvey Oswald through the basement of Dallas Police Headquarters when Oswald was shot by Jack Ruby.
Notice the difference in the position of Oswald relative to Leavelle in the photo below, before the gunshot. Leavelle, who was handcuffed to Oswald, said when he saw Ruby with the gun, he tried to jerk Oswald behind him, but Ruby was so close by that time that all he was able to do was turn Oswald sideways.
RIP Jim Leavelle