Police say Joseph Santiago was walking on Ridgeway Avenue around 1:20 a.m. on August 23 when he was struck by a westbound white vehicle that fled the scene.
Police think the vehicle has front-end damage on the passenger side and the undercarriage.
The victim was pronounced dead at the scene by a physician assistant from the Office of the Suffolk County Medical Examiner.
The investigation is continuing.
Detectives are asking anyone with information about the crash to contact the Vehicular Crime Unit at 631-852-6555 or call anonymously to Crime Stoppers at 1-800-220-TIPS.