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Diana Robertson

Case from Pierce County, WA dated Dec 12, 1985

Victim Details

Diana Robertson

Female

White / Caucasian

Pierce County

WA

1985-12-12

21

Diana

Robertson

07/07/2026

Case Description

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On a winter day in 1985, a young Caucasian mother named Diana Robertson, age 21, ventured into the mountains near Tacoma, Washington, an outing that would become her last. On December 12th, she, her 36-year-old boyfriend Mike Riemer, and their two-year-old daughter, Crystal, set off in Riemer’s pickup truck to find a Christmas tree and for him to check his animal traps. The day took a dark turn when their daughter was found wandering alone that afternoon outside a Kmart in Spanaway, miles from ...
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Links to Additional Sources (9)

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  • Diana Robertson - Unsolved Mysteries
  • Diana Robertson - Unsolved Mysteries Wiki - Fandom
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    Forum Posts (1)

    I've been digging into the details of the Diana Robertson case, and something has been puzzling me. ... ...Read More
    04/11/2024
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    Other Cases from Pierce County, Washington

    Mike Riemer death by force case in Pierce County, WA

    Mike Riemer

    Death: Dec 12, 1985
    On a cold December day in 1985, 36-year-old Mike Riemer, a White male, vanished from the rugged land n ...Read More