Robbery at knifepoint over BB gun in Northampton

As discussed during the dispatch call, radio traffic reports a possible robbery at knifepoint. A man says he went to meet someone on Washington Avenue to sell an item and was robbed of a BB gun. The victim is waiting for officers near the intersection of Northampton Avenue and East 11th Street in a white Volkswagen Jetta and plans to point out the suspected robber when police arrive.