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.