prosecutor wanted the jury to understand was how many times adkins had changed his story about that night. detective bratton told jurors about adkins' story version number one: that he'd been a good samaritan who'd stopped to help dana. >> he stated that he was driving south and seen something in the roadway. >> reporter: then came adkins' story number two, the detective testified. dana had been in his car, but had fallen out. the detective told the jury he didn't buy it -- he'd checked out that car for himself. >> and what did you observe in doing that? >> i didn't observe any problems. >> reporter: finally there was adkins' story number three, prosecutors argued, when he came up with that new detail -- the mailbox. >> how did the back of her head get caved in? >> that pipe from the mailbox that was there. >> reporter: but if adkins was lying about it being an accident, prosecutors needed to tell the jury what really