MSNBC Dateline Extra November 25, 2019 04:03:00
Steven avery behind bars. why would steven avery do this? >> that's a good question. >> reporter: we asked ken katz, who wrote a book about this. >> he started planning this event the first day he went to prison. >> reporter: and we talked with a lead investigator of the case, who has come under fire for this silent interrogation. why are you sitting here today? >> i realized that someone yo needed to speak out to tell the truth of what happened. >> reporter: so, what did happen here?ha the story begins with the woman at the heart of this case, a 25-year-old photographer from wisconsin named t...