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 else see Frederick or the man he was with that day near his father's house?
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clue
Lead #3What were the circumstances that led to Frederick leaving with this unknown individual?
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 nearly four decades. The circumstances of his disappearance remain unclear, and investigators are seeking information about the identity of the man he was last seen with and what may have occurred that day.
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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.
🔍
evidence
Lead #4Are there any records, statements, or physical evidence from the initial 1986 investigation that could provide new leads?
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Even the smallest detail could be the key to solving this case.
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 case MP55525 / K86-014217 after Frederick failed to return.
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