From Wikipedia

https://en.wikipedia.org/wiki/Jim_Sullivan_(singer-songwriter)

James Anthony Sullivan (August 13, 1940 – disappeared March 6, 1975) was an American singer-songwriter and guitarist who released two albums before he disappeared without a trace in New Mexico.

Sullivan left Los Angeles on March 4, 1975, to drive to Nashville alone in his Volkswagen Beetle. The next day, after being cautioned by a highway patrol over his driving, he checked into the La Mesa Motel in Santa Rosa, New Mexico. Later reports suggest he did not sleep there, and left his key inside the room, but bought vodka at the town store. He was seen the following day about 26 miles away, at a remote ranch owned by the Gennetti family. His car was later found abandoned at the ranch, and he was reportedly last seen walking away from it. The car contained Sullivan's money, papers, guitar, clothes, and a box of his unsold records.

He was never seen again, and reports have variously attributed his disappearance to being murdered, becoming disoriented and lost, or, particularly in the light of the title of his first album, alien abduction. Search parties failed to find any trace of him. A decomposed body resembling Sullivan was later found in a remote area several miles away, but was determined not to be his.

Links case

http://weekinweird.com/2013/01/27/uf...usician-space/

https://aquariumdrunkard.com/2010/11...llivans-u-f-o/

http://ultimateclassicrock.com/missi...er-songwriter/