shane moore: ow!rla tryber: oh, god. kelly moore: she shot him. carla tryber: oh, god. oh, god. oh, tucker. keith morrison (voiceover): with the phone still recording, you can hear kelly ask tucker for the gun. kelly moore: give me the gun, honey. give me the gun. tucker reed: why do you need the gun? kelly moore: here. keith morrison (voiceover): then, told shane is still alive, barely, tucker reacts with an obscenity. keith morrison (voiceover): when detective young saw the video, he knew right away. this was a very different set of circumstances than we were told during the initial interview with tucker. keith morrison (voiceover): during his investigation, young discovered that just two hours before he was killed, shane called the sheriff's office saying he feared for his safety. keith morrison (voiceover): remember, tucker told the police she didn't know how the gun worked, said she was surprised when it went off. turned out, she'd already fired it that very day. keith morrison (voiceover): when

thank you for watching. ] shane moore: [shouts] craig melvin: a recording of a killing-- carla tryberoore: she shot him. craig melvin: --captured by the killer herself.