The names Peter, Barbara Ann and Gerald Egan were familiar to Watertown police before December 31, 1964.
Theories ranged from a simple confrontation gone awry to a premeditated act of retribution by har.
The gruesome gangland-style killings puzzled local and state police.
But on that New Year\'s night, the Egans were shot execution style at a rest stop off Interstate 81.
The police suspected the trio in a long string of burglaries, and they were under investigation by the FBI for grand theft auto.
The names Peter, Barbara Ann and Gerald Egan were familiar to Watertown police before December 31, 1964