The gunman who killed four people in New York City had a “documented mental health history” – and a concealed-carry permit for firearms at the time of the mass shooting on Monday. Shane Tamura (27) ...

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the car he drove across country from his supervisor at a Las Vegas casino ...

The man who killed four people at a Manhattan office building bought his AR-15-style rifle and getaway car from his Las Vegas ...

The New York City Police Department sent detectives to Las Vegas to work with the Bureau of Alcohol, Tobacco and Firearms to ...

A robotic dog was used to enter the Las Vegas home of the suspected New York gunman, who is accused of killing four people and himself in a shooting inside a Ma ...