be connected with her, there -- it's my fault. i'm sure it's the way people would look at it, it's james. >> do you know where marie is? >> no, i do not. if i did, i would go get her. >> did you kill marie carlson? >> no. >> reporter: and that was that. they were stalled. marie was missing. and the case was getting very cold. coming up, new revelations from the pastor. >> they were sending pornographic photos back and forth from the church. >> and an answer at last to the biggest mystery of all. where was marie? >> nesli passed me a note that said, i missed her. >> i was pretty devastated. the guilt. the feeling of, i could have found her six months after she was reported missing. >> when "dateline" continues.