Theresa Marcoux and Mark Harnish were murdered more than 40 years ago at a rest area in West Springfield, Massachusetts, and the person responsible for their deaths has yet to be brought to justice.
At around 9:30 a.m. on Nov. 19, 1978, an officer was patrolling a rest area on Route 5, along the Connecticut River, when he discovered the bullet-riddled bodies of Marcoux, 18, and Harnish, 20.
They were located behind a 15-foot concrete retaining wall, according to the North Adams Transcript.
Harnish’s vehicle, which was a dilapidated pickup truck, was found nearby with the driver’s side window blown out by a gunshot.
An autopsy revealed that Marcoux and Harnish, a couple from East Longmeadow, had died from multiple gunshot wounds.
The Hampden County medical examiner determined that the shooting occurred sometime between 1 a.m. and 9 a.m. that morning.
They were believed to have been shot with a large-caliber handgun.
Marcoux and Harnish were fully clothed when they were found, and there was no sign of sexual assault.
It was reported that Marcoux and Harnish were high school dropouts and living out of their truck at the time of the murders, but they both had jobs.
Harnish worked as a mechanic, while Marcoux was employed at a hardware store.
Following a police investigation, it was revealed that as the couple was sleeping, multiple shots were fired through the driver’s side window.
At the time of the shooting, Harnish was sitting in the driver’s seat, and Marcoux was presumably in the passenger’s seat.
Marcoux and Harnish were then dragged out of the truck, and their bodies were discarded behind a retaining wall, according to The Berkshire Eagle.
Investigators are unclear about the motive for the slayings, but it has been reported that it was unlikely to be a robbery.
Anyone with information regarding the unsolved murders of Theresa Marcoux and Mark Harnish is encouraged to contact the State Police Detective Unit at (413) 505-5941.
Or the State Police Unresolved Cases Unit at 1-855-627-6583, or send a text with the word “solve” to 274637.