Robert Owen Calvert was found dead in his Limerick Avenue home in San Diego on May 3, 1992 after friends discovered his body and called police. He had been shot multiple times in the head; the wounds were described as highly accurate and professional, prompting investigators to treat the killing as a targeted, possibly orchestrated hit.

Calvert had ties to the drug trade as a user and seller and associated with motorcycle gang members and people believed to have mob connections, details that complicated the investigation and led authorities to consider a professional motive. Several people were interviewed but detectives could not develop enough evidence to charge anyone. The case remains an unsolved homicide in San Diego.

Anyone who knew Calvert, his movements in early May 1992, or has information that could help investigators is asked to come forward.