UNSOLVED HOMICIDE: DIANA ROBERTSON

When a young family ventures into a remote Washington forest in search of the perfect Christmas tree, a dark mystery unfolds. Parents go missing, a child is found wandering alone in another town and all of Washington state wonders whether a serial predator may be waiting in the woods in this episode of Last Seen Alive.

A 1985 newspaper highlights the search efforts made to locate Diana Robertson, her boyfriend Michael Riemer and 2 year old daughter, Crystal. The young family went missing on December 12, 1985 whenever they ventured into the forest near Mineral, WA to search for a Christmas tree.

Diana Robertson (right) is pictured with her boyfriend Michael Riemer (left) in an undated photograph. Diana died of homicide, while the manner of Michael’s death is officially unknown.

Sources used to write this episode:

Diana Robertson (Unsolved Mysteries)

Woman’s Body Discovered (The Spokesman-Review, Feb. 20, 1986 ed.)

Police Say Boyfriend Could Be Slaying Suspect (Seattle Post-Intelligencer / George Foster)

Bureau of Justice Statistics Selected Findings: Female Victims of Violence (Bureau of Justice Statistics)

Skull Discovery Revives Washington Mystery (The Seattle Times)

Mystery Lingers: Discovery of Trapper’s Skull Adds Clue to Couple’s 1985 Disappearance (The Olympian / Stacey Mulick)

Are Cases Tied? (Ellensburg Daily Record)