The driver in the apparent high-speed crash was rushed to Brookdale University Hospital, where he was pronounced dead on arrival.
The vehicle struck the tree on Kings Highway near Beverly Road just before 4:30 a.m.
The wreckage was wrapped around the tree.
The victim has not been identified, and authorities will only say he was a 22-year-old off-duty police officer.
Kings Highway was closed for the police investigation.
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