Dean Arnold Corll. Murderer/Murder Victim. Along with his teenage accomplices, David Brooks and Elmer Wayne Henley, Dean Corll killed 27 young men and boys in a three-year period. His crimes went undiscovered until August 8, 1973, when Henley killed him in what he claimed was self-defense. Henley and Brooks took police to the burial sites of the boys’ bodies: 17 in Corll’s rented boat shed, 4 near Corll’s father’s vacation cabin at Lake Sam Rayburn, and 6 more on High Island Beach.