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.

Authorities said the suspect in a shooting at The Owl Bar in Anaconda, Montana, was believed to be armed and dangerous.

The man accused of killed four people at a Montana bar on Friday morning lived next door to it, according to the Montana ...

A manhunt is intensifying for the gunman who allegedly killed a bartender and three patrons at a bar in southwestern Montana, ...

Authorities were focusing on brushy terrain near the town of Anaconda, where they said the suspect killed four people.

Officials continue to search for the suspect involved in a mass shooting that occurred in Anaconda on Friday morning.The ...

ANACONDA, Mont. -- Authorities are scouring a mountainous area of western Montana for a military veteran who they say opened ...

Michael Paul Brown is wanted for a mass shooting at The Owl Bar in Anaconda in which four people died. Brown, an Army veteran ...

Police are searching for a U.S. Army veteran who they say opened fire in a bar on Friday, killing four people in the ...

Several people have been shot near a bar in Anaconda, Montana, according to local media reports. Witnesses reported that a ...

Four people were killed in a mass shooting at The Owl Bar in Anaconda, Montana, on Friday morning, prompting a large-scale ...

Brown is believed to be armed and dangerous, the Anaconda-Deer Lodge County Law Enforcement Center said in a Facebook post, ...