On February 4, 1979, 17-year-old Billy Baumgartner of San Mateo, California, was shot execution-style in the back of the head during a robbery at the Payless Drug Store at 666 Concar Avenue. Two coworkers, Tracy Anderson, 16, and Michael Olson, 24, were killed the same way; about $20,000 was taken in the robbery.

The San Mateo Police Department investigated but the case went cold; no arrests have been made. Detectives have continued to revisit the investigation over the years and in 2011 announced they had developed new information, though details were not released because the investigation remained active. Families of the victims and the Governor of California have offered rewards and made public appeals for tips.

Anyone who knew Billy, worked at that Payless, or has information about the robbery is asked to contact investigators.