Adair was last seen near his Santa Rosa, California residence at 4:00 a.m. on December 17, 2005. He was at a party when he left on foot to pick something up and never returned. He has never been heard from again. Adair's family reported him missing on December 24 after their own search for him yielded nothing. He lived alone at the time of his disappearance, but had relatives in the local area. His case remains unsolved.