He then taunted police investigating the case with letters emblazoned with mocking smiley faces. He’s currently in an Oregon penitentiary serving a life sentence without the possibility of parole.

By signing his morbid notes with a happy face, he earned himself the notorious nickname, "Happy Face Killer" and forever left his mark of fear.

Jan. 27 (UPI) --Dennis Quaid's Happy Face true-crime series is set to premiere March 20 on Paramount+. Tony Award winner Annaleigh Ashford plays Melissa Moore, daughter of Keith Jesperson ...