An employee was identified as the gunman in a shooting at the MillerCoors building in Milwaukee, law enforcement officials told ABC News.

The Molson Coors Beverage Company is reopening its Milwaukee brewery campus on Monday with extra security measures nearly one week after five employees were gunned down.

Law enforcement sources have identified the employee of the Molson Coors Beverage Company who gunned down five co-workers at the company's Milwaukee Brewery campus.