We're following two breaking stories as we come on the air.

Nancy Guthrie's family officially ruled out as suspects in her disappearance.

Plus, the deadly shooting during a high school hockey match.

But in Tucson tonight, police clearing the family and their spouses as suspects.

More than two weeks since Nancy was taken. Will DNA on a glove found nearby lead

investigators to a suspect? Also breaking the deadly shooting inside of a Rhode Island hockey arena.

The moments the gunmen started firing, caught on camera, students racing to safety across the ice

as families in the stands run for their lives.

Two dead plus the shooter what we're learning tonight.

The fiery home explosion, how a man inside got out alive as 50 other homes are forced to evacuate.

Also tonight, the American Olympian who just tied the record for the most medals ever

for a woman in the Winter Olympics, as Ilya Malin opens up about his disastrous performance,

what he's saying about the pressure he felt. Plus, the curling controversy was this finger

touch illegal? The profane shouting match on the ice as accusations fly.

Powerful storms slamming millions out west, dumping feet of snow and unleashing dangerous flash floods.

A woman trapped in a cave hundreds of feet below for 17 hours, the daring rescue to free her. And meet the moms making

their mark on the winter games. How these incredible athletes balance motherhood and meddling. Nightly

News starts right now. This is NBC Nightly News with Tom Yamas.

And good evening. We begin tonight with major new developments on the case that's now gone unsolved for more than two weeks. The disappearance of Nancy Guthrie, mother of our

colleague Savannah. The Pima County Sheriff announcing that investigators have officially cleared the Guthrie family,

siblings and spouses included of any wrongdoing in this case, calling any suggestion to the

contrary, quote, cruel. Police now focusing on a glove similar to the one you see right here

...