Detectives Cathy News Today

Cooperative. >> he voluntarily gave head hair samples, he gave a blood sample, he gave fingerprints. and at the end of that, he ultimately said, you know, "whatever i can do, ill do." >> reporter: but as he read the file, daron learned there were other things sam didnt do. for example, sam lived right down the street, yet cathys family says he never stopped by during that whole frantic week when they were searching. he did speak extensively with police. >> i dont think anybody thought that sam w...

But at the same time, daron had to admit that sam certainly did not fit anyones profile of a murder suspect. >> no criminal history. there was no indicators that he was anything other than, you know, a normal 22-year-old kid. >> he didnt sound like a killer. >> no, absolutely not. >> reporter: detectives had interviewed sam on two separate days, first on audiotape when cathy went missing. >> he voluntarily gave head hair samples, he gave a blood sample, he gave fingerprints. and at the end of th...

Cathy. where the heck could she be. >> reporter: he had always been cooperative. >> he voluntary gave head ir samples, he gave a blood sample, he gave finger prints. and at the end of that, he ultimately said, you know, "whatever i can do, ill do." >> reporter: but as he read the file, daron learned there were other things sam didnt do. for example, sam lived right down the street, yet cathys family says he never stopped by. during that whole frantic week when they were searching. he did speak e...

>> he voluntarily gave hair samples, he gave a blood sample. he gave fingerprints. >> i dont think anybody thought that sam was telling the truth. >> remember how sam told detectives cathy came to him looking for weed? but -- >> there was absolutely no indication that any of that was true. >> which called into question sams story. >> it does. >> reporter: and daron noticed

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