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246 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Thad Fumio Sugai, a 26-year-old Hawaiian Native man from Honolulu, was working as an officer with Hawaii’s State Security Division when his life was cut short on December 20, 1983, inside Diamond Head Crater. The day had already taken on a strange and dangerous shape before he arrived. Reports described a man inside the crater behaving wildly, terrifying visitors, throwing rocks, and even jumping on cars. What should have been a response to a disturbance in one of Oahu’s most recognizable pl ...Read More

Victim Details

Thad Fumio Sugai

Male

Hawaiian Native

Honolulu

HI

1983-12-20

26

Thad

Fumio Sugai

Yes

05/02/2026