What are the factors that motivate a mass shooter? Washington Navy Yard shooting suspect Aaron Alexis had several characteristics common among mass killers, experts say: aggression, difficulties on ...

And I'm Renee Montagne. Let's focus for a moment on the mental state of Aaron Alexis. He's the man identified as the shooter who killed 12 people at the Washington Navy Yard on Monday, and then was ...

North Texans who knew Washington Navy Yard gunman Aaron Alexis continue to feel puzzled by revelations in the case. Nutpisit Suthamtewakul met Alexis years ago at a Buddist temple in White Settlement, ...

Aaron Alexis Was Once a New Yorker With a Gun PermitHe had NYPD approval to use a rifle at ranges.

Police have identified all of the victims of Monday's shooting spree at the Washington, D.C., Navy Yard, as they begin to piece together more about the man who killed 12 people and injured eight ...