n.g. burrell has probed the mindes of the nation's most violent criminals.has been granted access to ron luff. in 1990 luff was convicted of aggravated murder and kidnapping for his role in the cult murders that took the lives of five family members. he is serving five consecutive life sentences at the ross correctional facility in ohio. >> what i'm looking for in today's interview is try to get a sense of what this man's history was like, to see if there was anything unusual that would have contributed to his becoming a cult member. usually, being in a prison ups the anxiety level. i guess the curiosity of doing this sort of thing, you can never predict how someone is going to behave. >> hi, i'm dr. barill. i'd like to thank you for participating in this interview. i want to start off asking you some very basic questions. what precisely were you convicted of? >> five counts of aggravated murder and four counts of kidnapping. >> the real question becomes, how did you get to that place? >> everyone has a vulnerable time in their life but they're vulnerable to