 He vanished en route to a scheduled Beverly Hills conference on May 13, 1983, and was reported missing days later by his personal assistant.His remains were found a few weeks later by a beekeeper and a forest ranger near Gorman, California, about north of Los Angeles.Several years later, contract killer William Mentzer was among four people sentenced for shooting Radin multiple times in the head and using dynamite to make identification by authorities more challenging.