case that could be solved. if it had a new set of eyes, it had somebody that could put the case together, connect all of the dots. >> what requests did you make of them? >> we wanted to know more about every piece of evidence, every -- we have to rule out every piece of dna in that house. so it was closing doors, it was excluding other people. >> reporter: so, that's what these three did, as a large photo of tara kept watch. but, again, there was no dna to help them. all they had really were lingering suspicions about the workmen who went to tara's house the day she vanished. phil barr, the guy who owned the septic tank business, his helper that day, dave mcmannis, and their buddy "peewee" st. john, but nothing in this huge trove of investigative material proved anything. >> kurt, we call him "the scribe." he organized it in -- in such a way that it was easier to understand. >> what had been difficult to understand? >> it was confusing to the point where you didn't know what we