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 Frederick was last seen with on November 26, 1986?
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witness
Lead #2Did anyone witness Frederick's departure from his father's house or see him after that day?
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clue
Lead #3What circumstances led to Frederick being outside his father's house that day, and were there any conflicts or plans mentioned?
Frederick J. Sigo, a 22-year-old American Indian male, vanished 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 nearly four decades. Despite the passage of time, investigators continue to seek information about his disappearance and the identity of the person he was last seen with.
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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 a white male outside of his father's house in Port Orchard, the day before Thanksgiving 1986.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:November 26, 1986
Last Updated:June 10, 2026
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Phone: 3603377101
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Case Information
Incident:November 26, 1986
Last Updated:June 10, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 3603377101
You can remain anonymous