Mass Shooting At Manhattan Skyscraper Leaves 5 Dead

A New York City police officer and three civilians were killed by a gunman who opened fire last night inside 345 Park Ave., a high-rise corporate building in midtown Manhattan. The suspect died of a self-inflicted gunshot wound, authorities said

Police have identified Shane Devon Tamura, 27, of Las Vegas, as the gunman. Officials say he acted alone and “has a documented mental health history.”

 Four people — an off-duty New York City police officer, an executive at the investment management company Blackstone, an employee of the real estate firm Rudin Management and a security guard — were killed.

Tamura’s motive has not been disclosed. Two officials familiar with the matter told NBC News, however, that he left a note in which he wondered whether CTE, a brain disease caused by head trauma, was a possible cause of his mental illness. The NFL is in 345 Park Ave., and Mayor Eric Adams said the gunman was trying to get to the league’s headquarters.