Peter Martin Arnsdorff was 19 when he disappeared after leaving work early on April 27, 2000. He told friends he was going to Bonny Doon Beach in Santa Cruz and said that if they didn’t hear from him by 7:00 p.m. they should come to the beach. Friends who followed his instructions found his vehicle and a sweatshirt there, but no other sign of him.

He is described as 5 feet 9 inches, 180 pounds, with sandy blond hair and blue eyes. Despite an ongoing investigation, no further clues have been reported and his case remains unsolved; he is classified as an endangered missing person. Anyone with information is asked to contact the Union City Police Department.