According to Light In The Attic, police stopped Sullivan for swerving on the road in Santa Rosa approximately 15 hours into his drive. They brought him in to a station, found him sober, and told him to rest at the La Mesa Motel. His car was later spotted at a ranch, where he was confronted by the family who lived there. A day later, his car was found 26 miles away, but there was no sign of Sullivan. His guitar, clothes, wallet, and copies of his second album were found in his car and motel room, but there was no note indicating what might have happened. Despite search parties and missing person reports, no further trace of Sullivan ever turned up. 

When Light In The Attic decided to re-release his records, employee Matt Sullivan (no relation) investigated Sullivan’s disappearance via “hundreds of phone calls, e-mails, letters, faxes, private detectives, telepathy, palm readings and meetings with Jim’s wife, son and producer.” The mystery remains unsolved and unsettling, particularly when considering the lyrics of the title track from U.F.O., in which he sang about driving into the desert and pondering whether Jesus had arrived on Earth via UFO. Despite no answers about Sullivan’s fate, Light In The Attic brought Sullivan’s music the attention it never received in the 1970s; NPR called U.F.O. a “mysterious masterpiece” and according to The New York Times, “the U.F.O. reissue vastly outperformed all of Sullivan’s previous record sales combined.”