The attorney for the man who sold what would become the deadly weapon in a mass shooting in New York City earlier this week ...

New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office ...

The NYPD continues to work with investigators across the country to learn more about the gunman in Monday's deadly Midtown ...

The NFL season kicked off at the annual Hall of Fame game with a moment of silence for the four people killed earlier this ...

NYPD said the gunman purchased the fully-assembled AR 15-style rifle used in the shooting from his supervisor.

There were 23 shell casings and 13 bullet fragments recovered from the lobby of 345 Park Avenue and 24 spent shell casings on ...

Four people, including an off-duty New York City police officer, were killed Monday when a gunman carrying a rifle opened ...

The gunman who killed four people in a New York City shooting Monday was the son of a former Los Angeles Police Department ...

Detectives searched the studio apartment of 27-year-old Shane Tamura, who shot five people on Monday before killing himself, ...

The gunman who opened fire at a Manhattan office building Monday, killing four people before taking his own life, legally ...

The Las Vegas casino security supervisor who sold the assault-style rifle used in Monday's mass shooting in a Park Avenue office building complied with the law, his attorney said.

NFL Commissioner Roger Goodell expressed sorrow following the deadly shooting at a New York City office building that left ...