Four people are dead after a man stormed a Manhattan office building at the height of Monday’s rush hour, leaving authorities to determine how the events played out. 

Shane Tamura, 27, of Las Vegas died by suicide after gunning down four people and wounding a fifth inside a building that is the headquarters of Blackstone and the NFL, according to authorities. 

“Pure evil came to the heart of our city and struck innocent people,” Police Benevolent Association President Patrick Hendry said at a news conference.

I don’t believe that there’s anything that could have prevented it,” Brosnan said. “If someone were to do precisely what he did — double-park their car, take a weapon out, strut 40 feet into a building and open fire — I mean, there could be triple the amount of officers in there, security and NYPD, and they probably could not have stopped it because of how quickly it unfolded and how random.”

The Associated Press contributed to this report.