Tina Tournai-Sandoval's disappearance from Greeley went unsolved for 22 years.

Now, with her estranged ex-husband John Sandoval in prison for her murder, Dateline NBC will profile her case as part of two-hour special at 8 p.m. on Friday.

The episode, titled "The Devil Was Watching," includes interviews with Tina's friends and family, Weld District Attorney Michael Rourke, and detectives Brad Goldschmidt, Keith Olson and Mike Prill.