Mohammed Alasmar approached the counter at the Speedway gas station and lifted his shirt, revealing what looked like a handgun, while demanding money around 10:45 p.m. March 1, East Brunswick police said.
Searching the area, East Brunswick police joined by the Hillsborough Police K9 Unit didn't find the robber, but they said they found evidence in a remote area behind the gas station.
Detective Crispin Farrace, in turn, identified Alasmar as a suspect, they said.Police arrested him last Thursday on robbery and weapons charges.
They then sent Alasmar to the Middlesex County Adult Correction Center in North Brunswick to await a detention hearing.
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