james steen, and the other two men. each said that the tonya/jennifer story was baloney.lhouse snitches from back in the day, and they stood by their testimony. more importantly greg oakes said they got nothing for testifying. so as you reviewed them, you found them credible? >> i did. >> reporter: why do you believe >> we have to look beyond just do we believe somebody or not. is there information that they can provide that can be backed up by other independent evidence? >> reporter: the d.a. didn't think he could believe anything jennifer wescott had to say, and he came to question tonya's credibility, too. >> i don't believe in tonya priest and her story. she said that had heard these admissions back in 2006. and i asked her, why didn't you immediately come forward to the police? and her response was, i simply didn't believe him. >> reporter: and after reviewing all the evidence, he decided there was no there there. >> i was convinced that they had had the right person. >> reporter: what would the motive be for these two thibodeau brothers? >> unfortunately, dennis, th