access and videotape. this was an effort to find out as much as we could about this man, his life and crimes. he's the one that set the limits on how far he'd go. a man known as the i-5 strangler agrees to talk about his crimes to avoid the death penalty. >> does it make you uncomfortable to have the cameras here? >> no. >> at what point during the process of taking the girl out did you know she was going to die? >> i haven't figured that one out yet. i don't know if it's halfway down the road or when i'm doing it. i don't know why i picked these seven out of all that i picked up and let loose. >> do you think you understood what you did your crimes? >> no. >> are you curious? >> oh, yeah, i don't know why i did them. >> would you like to know? >> throw it out there.