it was similar to the truck that ron harshman owned. ron's wife and melvin snyder once had an affair. >> whether it was harshman's truck or not, i don't know. we don't know. >> police discovered that harshman had purchased a .25-caliber handgun just a few weeks before melvin's disappearance. coincidentally, a .25 caliber shell casing was discovered in melvin's barn on the day he disappeared. police searched harshman's home and found ammunition for a .25-caliber weapon, but no gun. >> i asked him where the gun was and he said, you will have to ask teresa. she is the one who took the gun, she liked it and she took it. so when we asked her, she said no, it's a lie, i don't even like guns. i don't know anything about the gun. >> during their investigation, police also learned that ron harshman and melvin snyder once had an unpleasant confrontation over the affair that melvin was having with ron's wife. >> he learned that mr. snyder was coming to his home to pick up his wife and he crashed his car into him. >> he had a gun with him at that po