>> kevin kyne is a name on paper. that man is not a kyne.evin did serve some time in prison. and i -- i don't believe that diane would even want him to serve life in prison for her murder. but in my mind, he should still be behind bars. >> reporter: but now, kevin's got a second chance at life. he says he's dedicating it to his mother. >> she's looking down, and she sees that i'm maturing. and i am gonna be the man that she wanted me to be. >> reporter: so, in the end, what do we make of this mind-boggling whodunnit where no one can say for sure who murdered diane kyne? leaving a husband and son, still pointing the finger at each other, still professing love for diane but one of them still defiantly lying about having killed her. >> reporter: that's all for this edition of "dateline." we'll see you again friday at 9:00/8:00 central. i'm lester holt. for all of us at nbc news, good >>> there's this circle of death around the bay area where they've built these highways. >> next a ceremonial . >>> nbc bay area news starts right now. >> each pit