The Happy Face Killer: Mind of a Monster (2021) | DOCUMENTARY

A detective tries to outwit one of history's most demented serial killers.
Det. Rick Buckner suspects that long-haul trucker Keith Jesperson may be the Happy Face Killer, one of history's most disturbed serial murderers. Now, the detective must play a deadly cat-and-mouse game to prove Jesperson is the crazed killer they seek.