From Wikipedia: The Original Night Stalker is the name given to an unidentified serial killer and rapist who murdered at least ten people in Southern California from 1979 through 1986. The crimes initially centered on east Sacramento where at least fifty women were sexually assaulted between June 18, 1976, and July 5, 1979. The perpetrator was dubbed The East Area Rapist. In 2001, the Northern California rapes were linked by DNA to murders in Southern California.
The Original Night Stalker/The East Area Rapist was never apprehended; several suspects have been cleared through DNA, alibi, or other investigative means and methods.
The following message was left on one of his victims’ answering machine.