tape lounging in his living room, blissfully unaware two violent intruders are waiting nearby. >> butch casey lived a risky life. i don't believe sharon fully understood that. >> casey, apparently does. he had his home installed with a hidden security camera. >> in 1994, it was unheard of. they got extended play on the vcr. it could run for 12 or 24 hours. again, he was flamboyant. this woman, his girlfriend at the time just broke up with him or he with her. he installed the cameras because he thought she was coming back and ripping him off. while he was at work. he walked in, video running and he doesn't tell them. he had a camera in his bedroom. he had 200 video tapes of him having sex with women. certainly, the women are the most unfortunate. that was the most unlucky day for them. >> from what i can tell, they are just flirting. they are flirting with one another, having a good time, as you can see. >> he's already taken them through the house and shown them the backyard. the sliding glass door has been opened. >> i have seen that tape many times. every time you watch it, you just, you kn