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Mike Riemer

Case from Pierce County, WA dated Dec 12, 1985

Victim Details

Mike Riemer

Female

White / Caucasian

Pierce County

WA

1985-12-12

36

Mike

Riemer

07/03/2026

Case Description

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On a cold December day in 1985, 36-year-old Mike Riemer, a White male, vanished from the rugged landscape of Pierce County, Washington, leaving behind a chilling mystery that would endure for decades. On December 12th, Riemer, his 21-year-old girlfriend Diana Robertson, and their two-year-old daughter, Crystal, ventured into the woods. The family outing, intended for finding a Christmas tree and checking Riemer's animal traps, took a dark turn, marking the beginning of a complex and haunting cas ...
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Links to Additional Sources (9)

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  • Mike Riemer | Unsolved Mysteries Wiki - Fandom
  • Mineral, Washington murders - Wikipedia
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    Forum Posts (1)

    Has anyone else pondered how little Crystal must have seen or remembered from that fateful day? As t... ...Read More
    02/26/2025
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    Other Cases from Pierce County, Washington

    Diana Robertson death by force case in Pierce County, WA

    Diana Robertson

    Death: Dec 12, 1985
    On a winter day in 1985, a young Caucasian mother named Diana Robertson, age 21, ventured into the m ...Read More