gave him the gun. money to buy the black clothes. hired him as the a hit man. >> did he formulate this plan or combined effort between the two of you? >> he did. >> what plan did he tell you? what did he want you to do. >> go in the back door, walk in, and shoot him. >> reporter: did it upset him to tell you the story. >> not really. not that i could tell. >> reporter: did he seem relieved he had told someone. >> no. during this time i was talking to him. he was pretty calm talking about it. >> reporter: after the confession, kopp was charged with first degree murder and allowed to see his father. his girlfriend and then his son and then taken off to jail. so, case closed? well you would think given what kopp told the detectives in there. that was my reaction, and i didn't buy it. keith morrison: guess not, because he went on grilling this young woman for more than 12 hours. at the end of which, the detective played to her heart, her relationship