Muhammed Gebeli was found shot in the neck on the floor of Valentino Fashion in Bay Ridge Friday night.
The 65-year-old died at the hospital.
State Senator Marty Golden is offering a $5,000 reward, which is being matched by another local business owner.
"Mr. Gebeli was killed Friday night in an incident that has destroyed a family and has shocked a community," Golden said. "Justice must be served in this case and, we need the public's help to see that happen...My thoughts and prayers are with the Gebeli family."
Anyone with information should contact the 68th Precinct at (718) 439-4211.
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