but scott purk was just getting started. scott told you that tammy brought him the leftovers from the dinner that she'd had with the guy she was seeing. right. this is just like, you know, "hey, honey, here's some leftover orange chicken that this other guy and i didn't eat." right. tammy went to bed first. and scott finished off the leftovers. josh mankiewicz (voiceover): no detail, it seemed, was too small or insignificant for scott purk. it was like turning a faucet on. once you turned it on, he just kept talking. and i just kept writing down the answers. josh mankiewicz (voiceover): at times, it was hard to keep up. scott purk kept offering answers to questions the detective hadn't asked. and there seemed to be so much more he wanted to say. what scott purk said next would leave investigators stunned and wondering if he was more than just a distraught homeowner who liked to gab. craig melvin (voiceover): coming up. and he's doing almost everything he can to make himself sound like a suspect. yes, exactly. craig melvin (vo