shirley vian was outside of his normal, careful procedures.asy and his plan all worked out. when it went south, why didn't he just pack his briefcase and go back to work? it really doesn't make sense that he would impulsively and randomly pick on the home of a 5-year-old child. when we finally asked him about that, i said, "why did you veer so far from your very strict discipline?" and he said, "well, i was just all wound up that day." ♪ burgess: that happens, where they will plan something, it doesn't work out, but they're on a high and they have to find someone. and so that's where the impulsive aspect comes. it moves from a plan, and that fails, and then they're really angry, so the anger gets built up, and they just find a situation where they can strike. foulston: it was unpredictable, and that really was so disruptive to our community because nobody knew where, when, why, or who was gonna be next. ♪ hatteberg: when he made the phone call from a public pay phone, a firefighter came up right after him and was able to have a description of

the writer, who claimed to be btk, admitted to the murders of the otero family, shirley vian, nancy foxd to and gave details of all of those homicides. we have an individual who apparently has the uncontrollable desire to kill at times. this individual is responsible for seven murders in our city. nobody knew where, when, why, or who was going to be next. ♪ ♪ ♪ the idea behind the ghostbusters was to have people that didn't have any impressions of the investigation up to that point, who can put some fresh eyes on it. gagliano: you're gonna look at it from, "hey, do we need to go back and out and reinterview people? could we possibly have interviewed somebody with important information and we missed it?" the first part of the ghostbusters was just getting the case together. the case was all over the police department. it was in boxes, it was in folders in people's houses. the ghostbusters brought order to a dispersal of records. brady: part of the work was establishing a department database. we would look at, for example, there was a certain gun which was used in one of the killings, and