Gustavo Juan Cabrera, known as Gus, was 26 and a Vietnam veteran when he was last seen in El Cajon, California, on December 6, 1977. He suffered from PTSD related to his service and possibly schizophrenia. At the time he disappeared he was wearing a dark brown ankle-length coat; his apartment still contained personal belongings including uncashed checks.

Cabrera had a birthmark on his upper right arm and a scar on his left hand. The circumstances around his disappearance are described as suspicious and the El Cajon Police Department continues to treat this as an open missing persons investigation.

If anyone remembers Gustavo Cabrera, his routines, or has information about his whereabouts around December 1977, please contact the El Cajon Police Department.