a heated conversation about ben oxley. james asking dawn if she wants to have him killed. but that s where the stories diverge. dawn remember, says she told james, no, don t do it and fell asleep on the couch. but that s not james matlean s story. she was ecstatic about what was happening. she was happy i was going to kill somebody. you know? reporter: it was after midnight. dawn drew him a diagram of ben oxley s house, said james, so he could find his way to the bedroom. then he went to the 7-eleven, drew $40 out of the atm with dawn s bank card. and then together he said they went to the walmart. dawn waited in the car while james did the shopping, shotgun shells, gloves, a flashlight. she was just very happy about it. i mean, like you would imagine a kid going to disneyland. you know? reporter: but there was a problem. they d forgotten to bring the diagram of ben s house with them. the plan wasn t for dawn to go in the house. the plan was just for me to go in the house.