rachel newhouse.at point rex stopped being animated, he stopped big open, he stopped being talkative. >> it was out of control, right? rex, look at me. you got out of control? rex, tell me what you're thinking. tell me what's going through your head. >> at that point i got concerned, because once rex said he wants an attorney, that means the interview was done, we wouldn't be able to try to recovered their bodies or do any follow-up. it was over. i did not want him to invoke his right to remain silent. so you have to kind of treat him with kid gloves. >> talk to me. look at me. it's not easy. it's not easy, i know that. he shuts me off verbally, but when i touch him, that brings me back into i'm talking to him. he can feel the touch, but with rex, it still didn't work. >> you beat on me? >> huh? >> i said if you sit there and try keep beating on me. >> i'm not beating on you. >> yeah, you are. i'm not going to say nothing. >> i was afraid if i pushed it any further, he would invoke. so i made the deci