True Crime — The Odd Disappearance of Theresa Bier: Was Bigfoot to Blame?

In 1987, a man took a teenager camping, then returned home without her and claimed that Bigfoot took her. The case remains unsolved.

Skylar Aries
13 min readJan 8, 2023

Theresa Bier had already had a tough life by the time she was 16 years old in 1987. She was taken from her biological parents by social services and then was in several different households before she ended up in her uncle’s home in Fresno, CA.

When an older neighbor, Russell Welch, offered to take Theresa camping to search for Bigfoot, she was allowed to go with him. They went camping and she never returned. Welch had many stories for authorities about what had happened to Theresa, ultimately landing on the claim that Bigfoot took her.

A supposed image of Bigfoot captured in 1967 in Eureka, CA (LiveScience).

Although Welch was arrested at one point, he was later released. Nothing of Theresa has ever been found and no one has been held accountable for her disappearance, even over 30 years later. The main question still remains: what happened to Theresa Bier?

Note About This Case

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Skylar Aries

I write long and well-researched articles about unsolved and cold cases, as well as other true crime content. See all my articles at ColdCaseExplorations.com