Leonard Thomas Lake (October 29, 1945  – June 6, 1985) was an American serial killer who often used the alias Leonard Hill. Shortly after being arrested for a firearms offense and suspicion of auto theft and fraud, authorities were alerted to the crimes of Lake and accomplice Charles Ng when a confession/suicide note written by Lake prior to swallowing cyanide pills and committing suicide was discovered. Videotapes later found at his house provided evidence that the pair had kidnapped and killed numerous persons; they are believed to have killed from 11 to 25 individuals.