ABC News contributor and former NYPD chief Robert Boyce breaks down the ongoing police investigation after a gunman opened fire at a Montana bar, killing at least four people.

After a deadly shooting at an NYC building that housed NFL and Blackstone offices, safety experts say it’s high time ...

At least four are dead in a shooting happened at about 10:30 a.m. local time at The Owl Bar in Anaconda, according to the Montana Department of Justice.

A flatbed truck carried a digital billboard showing photos of Officer Didarul Islam and a commemorative message from his union.

A man stalked through a Manhattan office tower firing a rifle, killing four people, including a New York City police officer, ...

Police have identified the man who entered a Midtown Manhattan office building wearing body armor and opened fire killing ...

A gunman who killed four people inside a Manhattan office tower blamed his mental health problems on the National Football ...

The video above aired in a previous newscast. NEW YORK (PIX11) — A gunman who killed four people in a Park Avenue building ...

More Bronx connections have come to light following Monday's tragic mass shooting in Midtown Manhattan in addition to Police ...

Mourners packed a New York mosque to honor a Bangladesh-born police officer who was killed at an office building this week.

Roger Goodell was emotional on Thursday as he publicly addressed the deadly shooting that took place inside 345 Park Avenue, ...

Among the dead were a police officer, a security guard and two people who worked at companies in the building. An NFL ...