NYC shooting victims Didarul Islam, Wesley LePatner, Aland Etienne, and Julia Hyman were killed by a gunman inside Manhattan's 345 Park Ave.

The victims of the Manhattan office building shooting are identified as NYPD Officer Didarul Islam, Blackstone executive Wesley LePatner, Cornell grad Julia Hyman and security officer Aland Etienne.

Businesses across the U.S. are reevaluating security after a shooting at a New York City office building raised concerns about workplace safety. The attack on a seemingly secure tower left four people dead and has companies desperate to prevent similar incidents.