up your hands, not wearing handcuffs, not in custody. >> i'm free. >> that's right, this time conrad trumanict he wanted -- not guilty. >> conrad just kept saying did they say not? >> grabbed my arm, he goes are you sure? >> in the courtroom conrad's family shared tears of joy. >> i was giggling and crying at the same time, it was weird. >> on the other side of the courtroom aisle were tears of a different kind. >> i don't know, my heart sank and i just was in shock. >> you fainted? >> i did. i couldn't believe there was this -- situation where that long shot happened where he would be freed. >> juror brian christianson said he and his fellow jurors are no choice but to set conrad free. >> i believe that we all pretty much felt that he probably did it. >> but you voted to acquit. >> we vote totd acquit. >> because you had reasonable doubt. >> we had reasonable doubt. >> whether you believe he was innocent or not, measurements either put innocent man in prison or let a guilty man go free. >> you're right, but my opinion hasn't changed. do i think he got away with murder? i do. >> when your w

peace with a simple truth, the very thing that freed him, reasonable doubt, could also shadow conrad truman for the rest of his life. >> that's all for this edition >>> i'm craig melvin. >> i'm natalie morales. >> and this is "dateline." >>> marie was a very loving person. she had a heart of gold. what happened to this woman? my job is to be a truth teller and seek out the truth. i wanted to solve it. >> reporter: her case was a mystery for years. the mom with the tender heart and tough-as-nails career. >> she was part of the sheriff's department. her ultimate goal was to try to get into the fbi. >> reporter: she'd found a new sense of purpose in the church. her pastor and his wife, like family. >> they had taken her in, they were helping her out. >> i was like, i'm proud of you, you're finding god. >> reporter: then, one baffling text. and she was gone. >> i go, i know i probably watch a lot of "law and order" but i have this really gut feeling. >> because i was a mom, i just knew she didn't leave on her own. there was no way she left that baby. >> reporter: two moms at opposite ends of a