was one of the more scary things to people, is that it was so random. >> police asked anyone who might have seen anything suspicious to come forward. they also interviewed all of susan's friends, including her past romantic relationships. >> there had been a few people who had attempted to date her that she had denied. so they, of course, became part of a growing suspect pool. >> police also had to consider whether the perpetrator was a stranger. >> because of the location of the murder and its accessibility to a number of dormitories, they were looking at dormitory lists and who lived -- who lived in the area. >> she was such a blameless victim. the thing that we're all afraid of is some monster coming out of nowhere and snagging someone we love or snagging ourselves, and that's what happened to susan. >> then police learned of a remarkable coincidence. on the day susan was murdered, a subcontractor working on the new