. >> her name was barbara helton and when she was with police, she told them something she had kept to herself for the past several weeks. she said she knew jeff thomas and he had been staying at her house at the time of tara munsey's murder. on the the night of the murder, thomas returned home visibly agitated. >> he was dirty. he was muddy, and he was upset and he told her that he had messed up. >> i won have hurt her if she had gave me what i wanted. i asked him what he was talking about and he said she wouldn't have sex with him. it made him mad. he says he told me i shot, you know, i shot her three times in the head. he called it execution style, whatever that's supposed to mean. >> he called it execution style? >> yeah. >> the number of shots fired was inside information. police hadn't released those details to the media for these very situations. >> no one knew but us, the killer, and the medical examiner. >> but if her story were true, why hadn't she gone to the police sooner. >> she was scared of jeff thomas. she was scared for her own safety. >> it was only when she was actua