reporter: by then, conrad said he realized heidy had been shot in the head. when you went to heidy, did you see a gun? no. reporter: he remembered the pop he had heard and wondered if a stray bullet might have come through the bathroom window and hit heidy. i was trying to think of the noise and how it wasn t very lou and, you know, maybe someone could have shot something at the house. reporter: it seemed farfetched but he said neighborhood vandals had recently been shooting the back of his house with paint balls. i was utterly confused. reporter: within minutes, sergeant crook arrived. conrad by now had moved to the doorway of his home to wave crook down. he had blood on his hands and he was screaming and shrieking. reporter: conrad led the sergeant through the front door, up the stairs, and then into a scene straight from a horror movie. i could see heidy laying there. she was naked, blood everywhere, just right at the top of the stairs, just this horrific scene.
the house when heidy was shot, and there was no evidence of an intruder. i felt like they thought i did something. reporter: soon after he arrived at the scene, sergeant bill crook did begin to have his suspicions. we re telling him, conrad, back off. the paramedics are here. back off. and he wouldn t. reporter: he was what, moving around? yes. reporter: keeping paramedics from being at the body? yes, sir. reporter: there were other scenarios that needed to be explored, like accident and suicide. that s where detective tom wallace came in. there had been a number of theories. we obviously are going to exhaust them. that s going to happen. reporter: the medical examiner didn t make wallace s job any easier. his preliminary finding heidy s manner of death could not be determined. so wallace tackled each theory one by one. accident seemed hard to believe.
the house when heidy was shot, and there was no evidence of an intruder. i felt like they thought i did something. reporter: soon after he arrived at the scene, sergeant bill crook did begin to have his suspicions. we re telling him, conrad, back off. the paramedics are here. back off. and he wouldn t. reporter: he was what, moving around? yes. reporter: keeping paramedics from being at the body? yes, sir. reporter: there were other scenarios that needed to be explored, like accident and suicide. that s where detective tom wallace came in. there had been a number of theories. we obviously are going to exhaust them. that s going to happen. reporter: the medical examiner didn t make wallace s job any easier. his preliminary finding heidy s manner of death could not be determined. so wallace tackled each theory one by one. accident seemed hard to believe. thanks to conrad, heidy had firearms experience.
something was wrong at the truman house. she came out of the shower, and i heard a pop, and there s blood! and she s in blood! i have officers and paramedics on the way. okay? reporter: the 911 call came into the orem, utah, police department at about 11:00 p.m. that september night back in 2012. we got a call of a gunshot wound or some sort of injury. reporter: sergeant bill crook went to the truman home. so we all kind of rushed to our cars and headed that direction with lights and sirens. reporter: on the other end of the phone was conrad, kneeling on his kitchen floor covered in blood and consumed by panic. it was devastating. it was a nightmare. you can t even explain it. reporter: with one hand he held the phone. with the other, his bleeding wife. it was so hard. when it s your loved one like that. i had no i just did the best i could to try to keep her breathing.
reporter: by then, conrad said he realized heidy had been shot in the head. when you went to heidy, did you see a gun? no. reporter: he remembered the pop he had heard and wondered if a stray bullet might have come through the bathroom window and hit heidy. i was trying to think of the noise and how it wasn t very lou and, you know, maybe someone could have shot something at the house. reporter: it seemed farfetched but he said neighborhood vandals had recently been shooting the back of his house with paint balls. i was utterly confused. reporter: within minutes, sergeant crook arrived. conrad by now had moved to the doorway of his home to wave crook down. he had blood on his hands and he was screaming and shrieking. reporter: conrad led the sergeant through the front door, up the stairs, and then into a scene straight from a horror movie. i could see heidy laying there. she was naked, blood everywhere, just right at the top of the stairs, just this horrific