March 23: Manhunt over Denver school shooting ends overnight. Details on the rare tornados that strike near Los Angeles. Closer look at the death investigation of Buster Murdaugh’s classmate Stephen Smith.

<p>Breaking overnight: manhunt ends as police find the suspect accused of opening fire at a Denver high school. Plus, the severe weather threat impacting millions of people today, and breaking down the rare tornadoes that ripped through Southern California – Al Roker and Miguel Almaguer have everything you need to know. And, NBC News has new details on the unsolved death of Buster Murdaugh’s classmate, Stephen Smith. </p>