Collins Max Allan: Too Many Bullets

"In 1968, Nate Heller is there when Robert Kennedy is shot at the Ambassador Hotel. Heller takes it upon himself to investigate the murder when a friend of his and Bobby's raises doubts about the LAPD's investigation. Heller strongly suspects the involvement of Jimmy Hoffa (currently imprisoned), but Hoffa seems to be in the clear as the private eye looks into the possible presence of CIA enemies of RFK's on the murder night, the apparent manipulation of Sirhan Sirhan into a Manchurian Candidate-style assassin, and a probable second shooter"--