George Greenshields was 30 when he was last seen in Tampa, Florida, on October 30, 1989. He had attended the city’s Guavaween festival dressed as the Joker and is believed to have returned to his apartment afterward; his Joker costume, clothes, car keys and his Jeep Cherokee were found there but his wallet was missing and he was never heard from again.

Greenshields had been on probation for possession of Valium and was reportedly complying with the terms and close to completing his probation when he vanished. Investigators at one point considered a probation-related motive, and a warrant was later issued for his arrest over a probation violation, but no concrete leads developed. His driver’s license expired in 1992 and was never renewed.

The circumstances of his disappearance remain unsolved. Does anyone who knew George or who was in Tampa around Guavaween in late 1989 have information that could help clarify what happened?