Gregory M. Yamada, 21, was found dead on Oahu on September 8, 1986, in a secluded area beneath the H-1 near cane haul roads. A driver for the Oahu Sugar Company discovered a bloodied body about 1:10 a.m.; Yamada’s jeans and pullover shirt were intact, a sweatshirt was loosely tied around his neck, and his hands and feet had been bound with a gag present, suggesting he had been held captive. Investigators determined he had been beaten and thrown from the freeway above; autopsy findings cited fatal head injuries consistent with assault and the fall, and no drugs were detected.

No missing-person report had been filed before the discovery, and early roadblocks produced no leads. On the evening of September 8 a person used Yamada’s bank card at an ATM in Waianae at 6:13 p.m., a transaction that required a PIN and shifted investigators toward a possible robbery motive. Police released still images of that ATM user showing dark hair and facial hair, but no one has been publicly identified or arrested in connection with the killing. Did anyone see or recall unusual activity near the H-1 or the Waianae ATM on or around September 8, 1986?