The Disappearance Of Theresa Ann Bier

The Disappearance Of Theresa Ann Bier

Published: October 27, 2025

Duration: 1:02:58

In June 1987, 16-year-old Theresa Ann Bier vanished after going on a supposed Bigfoot-hunting trip in California’s Sierra Nevada mountains with 43-year-old Russell “Skip” Welch, a known meth user and self-proclaimed Bigfoot expert. Welch returned alone, claiming that Bigfoot had abducted her, though police suspected foul play. Theresa came from a deeply troubled and abusive background, having bounced between neglectful and violent relatives. Welch—linked to her uncle’s circle of drug users—was known for luring young girls into the wilderness under bizarre pretexts. After Theresa disappeared, Welch told increasingly erratic stories involving Bigfoot, satanic rituals, and supernatural beings, while inv...