Dean Arnold Corll (December 24, 1939 – August 8, 1973) was an American serial killer and sex offender who abducted, raped, tortured and murdered at least 29 teenage boys and young men between 1970–73 in Houston and Pasadena, Texas. He was aided by two teenaged accomplices, David Owen Brooks and Elmer Wayne Henley. The crimes, which became known as the Houston Mass Murders, came to light after Henley fatally shot Corll. Upon discovery, the case was considered the worst example of serial murder in United States history.