Courtlandt S. Gross, 77, a noted aerospace pioneer and former president of Lockheed Aircraft Corporation, was one of three people murdered at their Villanova, Pennsylvania home on July 16, 1982. His wife Alexandra, 72, and their housekeeper Catherine VanderVeur, 69, were found alongside him after a roofing contractor discovered the bodies at the back door. All three victims had been shot multiple times and there was evidence of forced entry.

Investigators linked the killings to 22-year-old Roger Peter Buehl after a robbery victim identified a composite sketch; .38-caliber shell casings at the scene matched casings from other crimes. Buehl, who had prior arrests including arson, drug possession and burglary, was charged with murder, assault and robbery in what became known locally as the Main Line Massacre. Anyone with memories of the case or information about the victims is asked to come forward.