loewen was provided a photo of a possible suspect.olice revolver. >> that gun freaked me out. it was the tangible reminder that there was a killer out there and that at some level the police thought he might be coming to see me. >> just what was it that drove dennis rader to bind, torture and kill so many innocent people? >> factor "x" is probably -- >> in his jailhouse interview, rader blamed his murder spree on that mysterious force he has always claimed was way beyond his control, factor "x." >> something that i used it, i actually think of maybe possessed with demons, i was dropped on my head when i was a kid. talked to some theological christian people and some of the people are really strong. they actually think, well, the bible says that there's demons within you, and got into you. that's the only thing i can figure out. i haven't, you know -- something drove me to do this. normal people don't do it. >> you can't stop it? >> i can't stop it. it's just -- it controls me. you know, it's like it's in the driver's seat. that's prob