. >> lou allen buehrle was a secretarial student when roger kibbe tricked her into meeting him for a job interview. >> if i understand correctly, ms. burleigh was your first homicide in 1977. >> first one. >> start with what was going on in your life that week and that day and how this came about. >> curiosity got me. i called a college in walnut creek and told the director that i was moving a company, makeup and all that crap, we're going to warehouse over here and i would like to find somebody who can be office manager, and she wanted to know how many i wanted to look at. i said one right now. i parked behind the theater at that time. she showed up and got out of her car and got in my van and we talked for awhile. i told her i forgot my paperwork and all this other stuff, can i see you tomorrow? that's where i should have stopped. right there. i kept going. >> for park dietz, this is a key moment to understand. why did kibbe keep going? what was his thinking that allowed him to follow through? to get answers, dr. dietz must ask the right questions in the right order. >> now when you met her the first time, this girl, what were y