The person at the center of this case
Antero Leinonen
Missing Person · Open
36 years waiting · since 1990
Missing Person: Antero Leinonen
Justice for Antero Leinonen — the trail went cold in 1990, but the truth hasn't.
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Key leads to think about
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evidence
Lead #1What were the ocean conditions on March 13, 1990? Were there rip currents, strong waves, or unusual conditions that day?
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witness
Lead #2Were there other beachgoers or witnesses present who observed Antero enter the water or saw anything unusual?
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clue
Lead #3Why was no body recovered despite extensive search operations? Could he have been swept out to sea?
On March 13, 1990, Antero Leinonen, a 46-year-old German tourist, disappeared while swimming at Waimea Beach Park in Haleiwa, Oahu, Hawaii. He dove into incoming waves while his wife remained on the beach and was never seen again despite an extensive search. The circumstances of his disappearance—whether accidental drowning, rip current, or other factors—remain unclear, and his remains have never been recovered.
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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.
⏰
timeline
Lead #4How long after Antero entered the water did his wife realize he was missing and alert authorities?
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Official wording
Source Narrative
NamUs case MP161847. Missing person: Antero Leinonen.
Last known contact: 1990-03-13 in Haleiwa, Honolulu, HI. Circumstances: On 3-13-90, Antero Leinonen and his wife were visiting Oahu from Germany, and went to visit Waimea Beach Park.
Antero was standing along the shoreline while his wife stayed on the beach. Antero dove into incoming waves, and disappeared.
An extensive search for Antero was conducted, however he was never found. Demographics: 46 years, Male, White / Caucasian.
Physical description: 6 ft 0 in, 175 lbs, hair: Brown, eyes: Blue. Clothing and accessories: Clothing: White and blue swim shorts.
Investigating agency: Honolulu Police Department | 90-098536 | 1990-03-13.
Timeline of Events
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1990-03-13
Antero Leinonen disappears at Waimea Beach Park
Antero dove into incoming waves at Waimea Beach Park while his wife remained on the beach. He did not resurface and was never found despite extensive search efforts.
Key Locations
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Case Information
Incident:March 13, 1990
Last Updated:September 26, 2026
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Phone: 8085293111
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Case Information
Incident:March 13, 1990
Last Updated:September 26, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 8085293111
You can remain anonymous