Floyd Boring and Roy Kellerman were the two ASAIC's of the Kennedy Detail reporting to Jerry Behn, the SAIC..
Floyd was involved in the Blair House attempt on the life of Harry Trueman by two Puerto Rican nationalists in 1950- ( The Truman family was living there while the White House was being renovated. It is located across the street from the White House.). Floyd ended up shooting one of the two people involved in the assassination attempt. It is not the one on the ground. He was killed by a mortally wounded White House Police officer by the name of Leslie Coffelt. Stuart Stout, one of the shift leaders on the Kennedy Detail was also involved. He was manning a Thompson Sub Machine gun just inside the main door to the Blair House in case the potential assassins made it that far.. The story is in the book, this is a photo of Floyd right after the attempt.