and i said, if i can roll them out, they are done. >> but there was a problem. to get that sample tested, he needed to get the cash strapped jones family to pay for it. i first kevin's mother hesitated, the test costing about $600. but the investigator insisted. what did she say? >> eventually she said something like, oh, shucks, it's just money. >> so she paid for it. and what a good investment it turned out to be. because because weeks later, steffy got a call from one of kevin's lawyers. the dna tests were back. and when you know -- >> he said, well, it matches gary done. >> the result strongly suggested that the dna on the condom wrapper was left by known's neighbor, gary done. now now steffy needed to check out dunn's alibi for the day nona was killed. dunn had told police he was out shopping with his mother.