. >>> hello and welcome to "da "dateline extra" i'm craig melvin though 18 years old, angie dodge was eager to live life on her own terms. she'd found a job and an apartment. then angie was stabbed to death in her bedroom. a local admitted he was one of his killers, a grisly tale police captured on videotape. for angie's mom, the troubling details revealed on that tape didn't give her answers. in fact, they raised more questions. here's keith morrison. >> reporter: they kept him here, deep inside the multiple walls and the armed doors, the rolls and rolls of razor wire, the confessed stabber, the convicted killer of that sweet young woman all those years ago. he's lucky to be alive probably given the nature of the crime and the appeal from that girl's mother for the death sentence, which made what that mother told us later on very puzzling indeed. >> let him go. it's the only thing his mother has. it's her only child. >> reporter: her name is carol dodge and the amazing story she'll tell us began on the worst day of her life. it was a thursday, june 16th, 1996, mid-morning. she placed