Leonard Thomas Lake, also known as Leonard Hill and a variety of other aliases, was an American serial killer. During the mid-1980s, he and his accomplice, British Hong Kong-born Charles Ng, raped, tortured and murdered an estimated eleven to twenty-five victims at a remote cabin near Wilseyville, California, in the Sierra Nevada foothills, located 150 miles east of San Francisco. After his 1985 arrest on unrelated charges, Lake swallowed cyanide pills that he had sewn into his clothing and died four days later. Human remains, videotapes, and journals found at Lake's cabin later confirmed Ng's involvement, and were used to convict Ng on eleven counts of capital murder.

Charles Chi-tat Ng is a convicted Hong Kong-born serial killer who committed numerous crimes in the United States. He is believed to have raped, tortured, and murdered between eleven and twenty-five victims with his accomplice Leonard Lake at Lake's cabin in Calaveras County, California, 60 miles (96 km) from Sacramento, between 1983 and 1985. After his arrest and imprisonment in Canada on robbery and weapons charges, followed by a lengthy dispute between Canada and the U.S., Ng was extradited to California, tried, and convicted of eleven murders. He is currently on death row at California Medical Facility.