Account
Jan 16, 2012
Jul 17, 2023
Marilyn
Koski
70
35
62 inches
64 inches
130 lbs
140 lbs
White / Caucasian
Female
The start of a new year brought a somber mystery to Portland, Oregon, in 1989 with the disappearance of 35-year-old Marilyn Sue Koski. In the early hours of January 1st, Marilyn, a resident of a houseboat on the Willamette River, vanished. She was a woman with a notable educational background, holding degrees from both Brigham Young University and Oregon State University, and had previously dedicated her time to teaching physical education and health. Concern for her well-being grew after two notes were discovered, one addressed to her next-of-kin and another to her roommate. The contents of these notes were alarming, as they suggested the possibility of self-harm. The last known description of Marilyn indicated she was wearing blue jeans, a pink and white shirt, a gray sweatshirt, and a purple and blue jacket, along with fur boots. Following the discovery of the notes, an immediate search was launched by authorities. The focus of their efforts was the Willamette River, given that Marilyn's home was a houseboat and the distressing nature of the notes she left behind. Investigators held the belief that she may have entered the water, leading to an extensive search of the river near her houseboat. Despite their diligent efforts, the search of the Willamette River yielded no signs of Marilyn. Her body was never recovered, leaving a painful void for those who knew her and a lingering question for law enforcement. In the absence of any further evidence or contact, her loved ones held a memorial service for her later that same month, grappling with the profound uncertainty of her fate. The disappearance of Marilyn Sue Koski has since become a long-standing cold case for the Multnomah County Sheriff's Office. With no new leads or evidence emerging over the decades, her case remains open, a silent testament to a life interrupted. The details of her disappearance, from the notes left behind to the fruitless search of the river, paint a sorrowful picture. Authorities believe she may have drowned, but without the recovery of her remains, this can only be considered a strong possibility, not a definitive conclusion. The case is a poignant reminder of the many individuals whose stories end without a final chapter, leaving families and communities to navigate an enduring sense of loss and the torment of unanswered questions.
Jan 01, 1989
Portland
Oregon
Multnomah County
No
11218
Multnomah County Sheriff's Office
Portland
Oregon
Multnomah County
97214
Keith Krafve
Detective Sgt.
501 Southeast Hawthorne Boulevard, Suite 350, Oregon
5039884300
County
Law Enforcement
89.24
Multnomah County Sheriff's Office
Blond/Strawberry
Blue
Blue
05/31/2026
