i have to look just like poor lil' innocent dawnie.ler. >> if you think about it, that's exactly right. >> yeah. it's terrible looking at it that way, though. >> but it's the [ bleep ] truth. >> it was all there. a prosecutor's dream confession. she even referred to herself as a cold-blooded killer. but there was one question anyone with a beating heart wanted to ask. why? there just had to be an answer. of that they were sure. would they ever get it out of her? >> why in the hell did you do it? >>> coming up -- >> at some point she was calling herself a hit man. >> a hit man but for whom? another painful revelation was in store for teresa's family. >> it hurts too much for me to say it out loud. >> when "dateline" continues. ♪ ♪ just two pills for all day pain relief. aleve it, and see what's possible. and also try alevex topical pain relief. the new sensodyne repair and protect with deep repair has the science to show that the toothpaste goes deep inside the exposed dentin to help repair sensitive teeth. my patients are able to have