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.

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

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

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 ...

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

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

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

Four people were killed in a bar shooting in Anaconda, US state of Montana, local media reported, citing law enforcement ...

Multiple injuries have been reported at a business in Montana, the Bureau of Alcohol, Tobacco, Firearms and Explosives said ...