Savannah Guthrie made a heart-wrenching plea for “proof of life” of her 84-year-old mother.

Officials say a man who is suspected in last weekend’s mass shooting at Brown University and in the fatal shooting of a Massachusetts Institute of Technology professor has been found dead in a New Hampshire storage facility.

The 18-year-old man who slaughtered 19 children and two teachers in Texas left a digital trail that hinted at what was to come.

There are things you should do if you see red flags for a mass shooting. Schweit says when it comes to preventing incidents of mass violence, community involvement is key. Authorities and advocacy groups, like Say Something, are educating the public on what to look for and what to do when they see a red flag for a mass shooting. What can be doneKoren compared the mindset that leads someone to commit mass violence to a highway with on-ramps and off-ramps. It's the community's job to make the observations, and law enforcement can put together a bigger puzzle.