Dean Arnold Corll was an American serial killer who murdered a minimum of twenty-eight teenage boys and young men between 1970 and 1973 in Houston and Pasadena, Texas. He was aided by two teenage 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, it was considered the worst example of serial murder in United States history.