In Today's episode, I dive into the mysterious 1987 disappearance of 16-year-old Theresa Bier in the remote Sierra Nevada mountains near Fresno, California. Accompanied by 43-year-old Russell Welch, a self-proclaimed Bigfoot hunter, Theresa vanished without a trace during an expedition in the wilderness. Welch was later arrested but never charged due to lack of evidence. What happened deep in those woods? Join me as I explore the strange circumstances, disturbing theories, and unanswered questions surrounding the Theresa Bier case—a mystery that still baffles investigators today.

Anyone with information about Theresa's disappearance is encouraged to call the Fresno Police Department at (559) 621-2541 The case number to reference is 8736264

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217DFCA - Theresa Ann Bier. (n.d.). https://www.doenetwork.org/cases/217dfca.htmlBigfoot Part 01 (Final). (n.d.). The FBI: Federal Bureau of Investigation. Retrieved April 26, 2025, from https://vault.fbi.gov/bigfoot/Bigfoot%20Part%2001%20%28Final%29/viewCalifornia Bigfoot Expedition 2025. (n.d.). https://www.bfro.net/news/roundup/california.aspCrair, B. (2018, August 16). Why do so many people still want to believe in Bigfoot? Smithsonian Magazine. https://www.smithsonianmag.com/history/why-so-many-people-still-believe-in-bigfoot-180970045/Galvan, L. (1987a, June 19). Man blames Bigfoot for missing girl. The Fresno Bee, B1–B4.Galvan, L. (1987b, June 19). Man blames teen-age girl’s disappearance on Bigfoot. The Camarillo Star, B5.Galvan, L. (1987c, June 20). Police release picture of girl who left on trip to find Bigfoot. The Fresno Bee, B3.Oct 04, 1987, page 9 - The Lompoc Record at Newspapers.com. (n.d.). Newspapers.com. https://www.newspapers.com/image/540243142/?match=1&terms=Theresa%20BierPulaski, A. (1987, October 3). Abduction Suspect Released. The Fresno Bee, B2–B3.StrangeOutdoors.com. (2024, December 17). The shocking disappearance of Theresa Ann Bier — StrangeOutdoors.com. https://www.strangeoutdoors.com/mysterious-stories-blog/theresa-ann-bierThe odd disappearance of Theresa Bier: Was Bigfoot to blame? (2025, April 6). Cold Case Explorations. https://coldcaseexplorations.com/california-cold-or-unsolved-cases/the-odd-disappearance-of-theresa-bier-was-bigfoot-to-blame/Theresa Ann Bier – The Charley Project. (n.d.). https://charleyproject.org/case/theresa-ann-bierYoung, J. C., & Widom, C. S. (2014). Long-term effects of child abuse and neglect on emotion processing in adulthood. Child Abuse & Neglect, 38(8), 1369–1381. https://doi.org/10.1016/j.chiabu.2014.03.008