New York City police detectives searched a studio apartment in Las Vegas that belonged to the suspected gunman in Monday's ...

Newly released body camera footage from Las Vegas police shows past encounters with Shane Tamura, the gunman in last month’s ...

The man who opened fire at a Midtown Manhattan office building last month, killing four people and injuring another before ...

The evidence documents Tamura's years-long struggle with mental health before he opened fire in a Midtown office building.

A lone gunman walked into a midtown Manhattan office building Monday and opened fire, killing four people, including an NYPD ...

The gunman from Las Vegas who committed the mass shooting last week in New York City repeatedly threatened to harm himself, ...

Nevada's gun laws are again under scrutiny after a Las Vegas man opened fire in Midtown Manhattan, killing four people and ...

During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed ...

A man carrying a rifle killed four people at a New York City office tower Monday, including an off-duty New York City police ...

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

Officer Didarul Islam, 36, who was guarding the building on a paid security job when he was killed, had served as a police ...

Former NYPD Sergeant Felipe Rodriguez weighs in on the gunman's actions and what we know about his background.