laci peterson, the beaming young mom to be. please, please, let her come home to us. keith morrison: prosecutors speak out in an in-depth television interview. you put so much of your life into it. it stays with you. keith morrison: laci s husband. finally hear the story he told. his rarely seen police interrogation. we couldn t find anything wrong with this guy. he was that charming. keith morrison: and surprising details from the other woman who helped uncover the truth. it s still affects me emotionally. keith morrison: did scott peterson kill his wife? i do not believe he did. i mean, really? who else could have done it? i m glad you asked that question. keith morrison: once upon a time, in a small california city lived a sweet pregnant woman with a radiant smile. and outside of friends and family hardly anyone knew her name. she would never know, of course, how famous that name of hers was about to become. we have no indication, no significant leads at this point. keith
and i asked him, how are you doing? and he said, you know, i m doing ok. and i just remember, it was almost like i was just pulling back from him, thinking, you re doing ok? what do you mean you re doing ok? keith morrison (voiceover): sharon definitely wasn t doing ok, while the cops, moving forward incrementally, needed more. police looking for laci peterson in modesto, california want to verify her husband s alibi. keith morrison (voiceover): modesto pd put out a bulletin. had anyone seen this truck, this boat on christmas eve? they expanded their ground search to the foothills, the reservoirs, even mineshafts. and by mid-january, police decided they needed to tell sharon about scott s affair. we said, hey, we ve got some information we got to let you know about on this. and the best thing we can do is just give it to you. keith morrison (voiceover): they showed her the photo at amber s christmas party, the one scott said wasn t him.