207 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.
Case Description
Any updates on this case? Let us know!
Mary Ann Bier, a 64-year-old white female from Powell, Wyoming, died on August 7, 2017, in what authorities determined to be a murder-suicide. Originally from Janesville, Wisconsin, Mary Ann was known for her independent spirit, environmental advocacy, and deep love for her family. She had moved to Wyoming in 1994 and worked as a rural postal carrier until her retirement in 2015. Her life was marked by a strong connection to nature and community, and she was affectionately regarded by neighborho ...Read More
Victim Details

Mary Ann Bier

Female

White / Caucasian

Powell

WY

2017-08-07

64

Mary

Ann Bier

Primary Suspect Deceased

11/09/2025