NEEDHAM, Mass. -- Needham police released 911 tapes Monday to explain a massive police response to an incident at a pizza parlor Friday afternoon.

The SWAT team-like response came at the same time the police had a manhunt under way for the killer of a town resident.

Listen to 911 Tape

Hillel Neuer was arrested in the town center after calls to police that he'd been acting suspiciously and had a gun. Police had simultaneously been looking for a suspect in a beating death earlier that day.

"The man's behavior had aroused so much concern that employees and patrons had fled the premises," police said in a statement.

Neuer, who is the head of a Geneva-based human rights group, left the building following the instructions from police and a disorderly conduct charge against him was dismissed Monday.

"Investigators determined that reports of the presence of a gun had been made based upon an incorrect assumption that had been made by those observing Mr. Neuer and his behavior," police said.

A clerk magistrate in Dedham District Court dismissed the charge against Neuer after finding there was no probable cause.

A spokesman for the American Jewish Committee said Neuer is executive director of Geneva-based U.N. Watch and was in Boston to deliver a speech.