Nov. 19, 1978The remains of Theresa Marcoux and Mark Harnish were discovered after an officer from the West Springfield Police Department located a 1967 green Dodge pickup truck owned by Harnish, parked in a roadway rest area on Route 5/Riverdale Street. Their bodies were lying by a nearby guardrail." "The officer saw that the driver's side window of the truck was damaged and noticed blood in and around the vehicle," the police post added, stating the victims — who had last been seen alive at approximately 12:30 a.m. that morning when leaving a friends' party — "appeared to have sustained gunshot wounds."  No Firearm is found at the scene but investigators do find a fingerprint...the suspects' left thumb print is found. The "latent print" is found in what appeared to be blood on the passenger-side vent window.....but no match is found and the case goes cold. Joseph Scott Morgan breaks down fingerprints and how they are of no use if you don't have something to compare it to. Joe will also show how the suspect almost got away with a double homicide.  

Transcript Highlights

00:00.00 Introduction

04:04.70 Changing from analog to digital

05:30.85 History of fingerprinting

10:04.68 Truth about fingerprints

15:15.96 A print on the scene 

19:26.74 Old Truck with bullet could be old

24:34.49 There was an "ear witness"

29:17.43 Blood and drag marks

35:03.19 Was glass embedded in the bodies

40:01.98 A match

42:45.74 Conclusion - arrest