A new of "Dateline" is coming Friday, March 14, with a shocking case about 2013 murder of a beloved middle school art teacher. In the episode entitled "Deadly Entanglement," the Dateline team goes ...

Lori Vallow sits down with Dateline NBC’s Keith Morrison for her first television interview. Vallow was sentenced to life in prison for murdering her two children, Tylee and JJ.