>> it was david lee parker's idea. >> it's pretty remarkable. it just seemed like it went up to date of level and each level it went up to, it became more overwhelming and i began to wonder, where's it going to end. >> and then they ended up giving me a rope and telling me to strangle her. and she wasn't dying fast enough. >> okay, but you say she wasn't dying fast enough. was she struggling or -- >> yeah, she was struggling. >> we have no doubt his statement was accurate. his details were such it's unquestionable roy yancey killed marie parker. >> i was told not to tell anybody anything or i was going to be killed and thrown in a ditch. >> who told you that? >> david. >> if roy yancey could take the police to where marie parker's body had been dumped, they'd have evidence to link ray to murder and a much stronger case. coming up, the search for marie