An off-duty NYPD officer was killed early Friday morning after a one-car crash on the Palisades Parkway in the town of Highlands. State Police say the 45 year-old man was heading northbound when the car left the roadway for unknown reasons and struck a tree in the median just north of exit 19. The unidentified New Windsor resident was taken to St. Luke Hospital where he was pronounced dead. This incident remains under investigation. Police ask anyone who may have witnessed the crash to contact them at 845-344-5300 [reference case number NY2400969180].