Leonard Lake (October 29, 1945 -- June 6, 1985) was an American serial killer. He often used the alias Leonard Hill. The crimes he committed with Charles Ng became known when Lake committed suicide by taking a cyanide pill shortly after being arrested for a firearms offense. Charles Chi-Tat Ng (born December 24, 1960) is a Chinese-American serial killer. He is believed to have raped, tortured and murdered between 11 and 25 victims with his accomplice Leonard Lake at Lake's ranch in Calaveras County, California.