Nassau County police say they got a 911 call around 4 p.m. Sunday for a body in the Mill Pond Park Preserve in Wantagh.
Responding offiers found Marvin Fuentes-Serrano, known as Dino to his friends, was slumped over a log.
Investigators determined that foul play was involved, but they have not yet determined a motive for the crime.
Police said Fuentes-Serrano's injuries made it obvious he was killed, but authorities declined to give details.
Police are asking anyone with information about the death to contact Crime Stoppers at 1-800-244-TIPS.