A gunman opened fire inside a high-rise office building in Midtown Manhattan July 28, killing a New York City police officer and three civilians before dying from a self-inflicted gunshot wound, authorities said.

The shooting occurred around 6:30 p.m. at a building on Park Avenue that houses the NFL’s headquarters. The motive for the attack remains unclear, but officials familiar with the investigation told NBC News that the suspect left behind a note referencing his mental health struggles.

Who are the victims in the NYC shooting?

The NYPD identified the slain officer as Didarul Islam, 36, a father of two who was expecting his third child. Islam, who emigrated from Bangladesh, had served with the department for three and a half years and was assigned to the 47th Precinct in the Bro

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