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246 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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In the winter of 1989, a tragic event unfolded in Billings, Montana, forever marking Valentine's Day with a somber memory. Alexander Finlayson Mavity, a 28-year-old White male and a dedicated detective with the Billings Police Department, lost his life in the line of duty. He had served on the force for eight years, earning the respect of his colleagues and the community he swore to protect.

The events leading to his death began with the arrest of a man named Ronnie Duworth on a parole vi ...Read More

Victim Details

Alexander Finlayson Mavity

Male

White / Caucasian

Billings

MT

1989-02-14

28

Alexander

Finlayson Mavity

Yes

04/25/2026