that call cost kenneth maxwell his life but saved a lot of evidence. >> bless his heart. he saved the investigation. he got 911 help there, the fire department put out the fire, and there was still plenty of evidence for us to analyze and work off of. >> kenneth maxwell's 911 call also prevented fire damage to the bodies. from the evidence at the scene, it appeared the killer caught fred barney completely off guard. he had been shot once in the back of the head. >> fred was wearing pajamas. it appeared that fred had been making a sandwich in the kitchen. there was no real sign of a struggle. >> rebecca's body was found in the bedroom. she had been shot numerous times, leading investigators to conclude she'd been the primary target. >> he puts that pillow over her face and he shoots her, and think it's significant that he shot her more than once. he shoots her three times because he is pissed. >> ballistic tests reveal all three murder victims, kenneth maxwell and fred and rebecca barney were all killed with a .22 caliber weapon, the same .22 caliber weapon. the lack of fo