The incident happened around 7 a.m. Sunday, Dec. 20 in Stony Brook.
The man, now identified as Ronald Destefano, age 54, of Lake Grove, was crossing Route 347 from south to north at Hallock Road when he was struck by a westbound vehicle that fled the scene, Suffolk County Police said.
A passing motorist called 911 at approximately 7:05 a.m. to report a body in the roadway.
Destefano was pronounced dead at the scene.
Detectives believe a silver vehicle, which sustained front and/or passenger-side damage, may have been involved in the crash.
Anyone with information about this crash is asked to call Major Case at 631-852-6555 or Crime Stoppers at 1-800-220-TIPS.
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