In this episode, Kaydee investigates a chilling case from Grays Harbor County, Washington, in November 1923. A string of brutal murders left a predominantly Italian immigrant community in terror. Central to the chaos was Guido Grassi, a laborer whose reputation for violence earned him the nickname the Cat-Man.

The night unfolded with shocking attacks: Joe Tollomi was found shot and slashed in his boarding house, while witnesses were injured, and John Ricci was murdered in a nearby shack. Amid dense fog and eerily silent streets, police scrambled to track the assailant. Survivors described him moving with catlike stealth, carrying a small white sack — a charm believed to render him untouchable.

Inside the sack were fragments of what appeared to be a human heart preserved in salt, thou ...