The person at the center of this case
Frederick J. Sigo
Missing Person · Open
39 years waiting · since 1986
Missing Person: Frederick J. Sigo
Justice for Frederick J. Sigo — the trail went cold in 1986, but the truth hasn't.
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Key leads to think about
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person
Lead #1Who was the unidentified white male seen with Frederick on the day of his disappearance?
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witness
Lead #2Did anyone else see Frederick or the unknown male on November 26, 1986?
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clue
Lead #3What were the circumstances that led to Frederick being outside his father's house that day?
Frederick J. Sigo, a 22-year-old American Indian male, disappeared on November 26, 1986, the day before Thanksgiving, from Port Orchard, Washington. He was last seen with an unidentified white male outside his father's house and has not been located in the nearly four decades since. The case remains unsolved, and investigators continue to seek information about the unknown male companion and the circumstances surrounding his disappearance.
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
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timeline
Lead #4Why was there a 17-day gap between Frederick's disappearance and the official case report?
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Official wording
Source Narrative
NamUs case MP55525. Missing person: Frederick J.
Sigo. Last known contact: 1986-11-26 in Port Orchard, Kitsap, WA.
Circumstances: Frederick has not been seen since the day before Thanksgiving 1986. He was last seen with a white male outside of his father's house.
Demographics: 22 years, Male, American Indian / Alaska Native. Physical description: 5 ft 5 in, 130 lbs, hair: Brown, eyes: Brown.
Investigating agency: Kitsap County Sheriff's Office | K86-014217 | 1986-12-13.
Timeline of Events
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1986-11-26
Last Known Contact
Frederick J. Sigo was last seen with an unidentified white male outside his father's house in Port Orchard, Washington, the day before Thanksgiving.
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1986-12-13
Case Reported
Kitsap County Sheriff's Office opened investigation case MP55525 / K86-014217.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:November 26, 1986
Last Updated:June 15, 2026
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Phone: 3603377101
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Case Information
Incident:November 26, 1986
Last Updated:June 15, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 3603377101
You can remain anonymous