Intact putty areas, you can see it fits perfectly. >> reporter: it was compelling evidence that tom may have been telling the truth. shaffer would need more than a shard of evidence. he next called this woman, the woman who came forward immediately following tom's guilty verdict and the reason he was ultimately granted a new trial. moore said she was driving past the house right around the time dar had been murdered. >> as i approached this white car come racing out forward. if i hadn't have braked, i would have hit him. >> reporter: she got a look at the driver. >> it was a young 18 to 20-yea...