A sheriff’s officer is dead after he fell from a window on the ninth floor of an administrative building in Jersey City, officials said.

The tragedy unfolded Friday morning at the Hudson County Administration Building, which includes several county government offices, including the sheriff’s office, according to a statement from the Hudson County Prosecutor’s Office.

Witness Steve Roosen said he was nearby when the officer — who has since been identified as 29-year-old Justin Rivera — plunged to his death just after 9: 20 a.m.

“I heard glass shatter and then immediately looked up, and saw a guy coming straight down,” he told CBS News. “I saw the officers perform CPR, maybe, three times, and then just stop.”

He said he then “saw two heads looking down” from a broken window, “as

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