mike vogel and kurt mehl. came down here to hurt, hunt, fish and play golf, and go boating, and go to the beach. and just relax. and that lasted a couple months. got very board. >> so, three board ex detectives put on badges again to form the sheriff's very first official called case unit. they decided early on they would work on tara's case. prosecutor feinberg was finally optimistic. sort of. >> i always felt that this was a case that could be solved. if it had a new set of eyes and 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. we had to rule out every piece of dna in that house. so, it was closing doors and excluding other people. >> you're going to learn from looking in these -- files >> so, that is what these three did. as a large photo of tara kept watch. again, there was no danny to help. all they had really or lingering suspicions about the work men who went to towers house the day