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A 36-year-old Riverside man was killed when struck by a drunk driver on County Road 105 late last night, Southampton Town Police said in a press release this afternoon.

Police said Ian S. Costanza was pronounced dead at the scene of the crash, which occurred on Route 105 near Flanders Road at about 11:45 p.m. Sunday.

Tyler A. Gaches of Shirley stayed at the scene and called police, according to the report. He was subsequently charged with driving while intoxicated, police said.

Gaches’ vehicle was impounded for further investigation, police said.

The Suffolk County District Attorney’s Office and Southampton Town Police are investigating.

Anyone who has any information regarding this incident should contact Southampton Town Polce detective division at (631) 702-2230.

Editor’s note: A criminal charge is an accusation. By law, a person charged with a crime is presumed innocent until proven guilty in a court of law.

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Denise is a veteran local reporter, editor, attorney and former Riverhead Town councilwoman. Her work has been recognized with numerous awards, including investigative reporting and writer of the year awards from the N.Y. Press Association. She is a founder, owner and co-publisher of this website.Email Denise.