milwaukee. who dissected dead animals as a child then later murdered and dismembered 17 young men and boys. but why would anyone ever suspect a man like dennis rader, consider his substantial involvement with his local lutheran church. paul carlstadt has known rader for 30 years and he was an exemplary member for years. he will run the sound system, be an usher, count the money after the service, if something was to be done, dennis was able to help. reporter: as hard as this may be able to believe, the serial killer considers himself a relidge jusz person. do you pray? yes, i do. i read the bible daily. it helps not only just for spiritual, a lot of it is good meanings and good concepts, things that you can use if life. even serial killers can believe in god.