A 47-year-old man was found dead in a pool of blood with apparent head trauma in the bed of a city Parks Department truck on Randalls Island on Friday morning, police and sources said.

The gruesome scene was discovered near Bronx Shore Rd. and Central Rd. around 7 a.m., cops said. A Parks Department employee found the man covered in blood, with extensive trauma to his head and body, in the truck bed during a vehicle inspection in a closed-off parking lot, according to a police source with knowledge of the case.

EMS responded and declared the man dead at the scene.

He had a hospital bracelet around his wrist and did not appear to be a Parks worker, the source said.

Police are investigating.

The Office of the Chief Medical Examiner will determine the man’s cause of death.

His ide

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