In the summer of 1987, sixteen-year-old Theresa Ann Bier vanished in the remote Sierra Nevada mountains—one of the strangest and most unsettling disappearances in California history. She had gone camping near Shuteye Peak with forty-three-year-old Russell “Skip” Welch, a man who claimed to be a Bigfoot "exper"t and promised to show her proof of the creatures he insisted were real.

When Welch returned alone, the explanation he offered investigators became infamous: he said Bigfoot had taken her. This episode examines the real facts behind Theresa’s disappearance, cutting through decades of rumor, folklore, and speculation. 

We explore who Theresa was, the troubled circumstances that made her vulnerable, and Welch’s disturbing behavior leading up to the trip. His story shifted repeatedly—wild tales that obscured the truth and frustrated investigators—but nothing he said ever led to a single piece of evidence.

Search teams combed hundreds of square miles with helicopters, dogs, and volunteers. Two separate campsite locations, drug paraphernalia, and threatening phone calls to Theresa’s family painted a picture far darker than anything involving legendary creatures. Yet without a body or physical evidence, prosecutors dropped the case just days before trial, fearing they would lose their only chance to seek justice.

Decades later, Theresa remains missing. Welch died in 1998, never revealing more, never abandoning his story. The mountains around Shuteye Peak have kept their secrets, and the truth about what happened to Theresa remains hidden somewhere in that vast wilderness.

This episode confronts the real events behind a case where myth became a shield, where a vulnerable teenager slipped through every system meant to protect her, and where the most terrifying part of the story has nothing to do with Bigfoot.

It’s a journey into the Sierra Nevada, into the shadowed intersection of human deception and wilderness mystery, and into a tragedy that still echoes nearly forty years later.