On the morning of November 19, 1978, 20-year-old Mark Harnish and his 18-year-old companion Theresa Marcoux were found dead just over a guardrail at a rest stop off Route 5 after being discovered near Harnish’s green Dodge pickup truck. Both victims had suffered multiple gunshot wounds; the truck’s driver-side window was shattered and blood was present in and around the vehicle. Investigators believe the couple were shot inside the pickup and their bodies later moved. A witness reported hearing several gunshots near 4:00 a.m.

The case yielded a single latent fingerprint in what appeared to be blood on the passenger-side vent window of the truck, but comparisons over the years produced no match and the double homicide remained unsolved for decades. In October 2024 a tip named Timothy Scott Joley; investigators located a 2000 taxi license fingerprint card for Joley and matched the latent left-thumb print to him. A two-count murder complaint and arrest warrant were issued and Joley was arrested in Clearwater, Florida; he waived extradition and was to be returned to Massachusetts to face charges.

Does anyone have memories of the victims, the area that morning, or other information that could help fill gaps in what happened?