The site of the shooting, 345 Park Avenue, is an office building that houses consulting firm KPMG, investment firm Blackstone, and corporate offices for the NFL. It's in Midtown Manhattan—designated a gun-free zone several years ago, which clearly has not worked.

The deadly Park Avenue shooting happened at one of the the most exclusive addresses in Midtown Manhattan — the “Blackstone Building," which is home to financial giant Blackstone, the NFL and accounting firm KPMG among a slew of other corporate names.

Four victims, including an NYPD officer, are dead after shots were fired on Monday at a building in New York that houses businesses, including Blackstone.