Florida ? A South Florida man was charged with first-degree murder Wednesday in the killing of a federal agent outside a busy post office in Davie.

James Patrick Wonder, 65, was detained without incident after a SWAT team and dozens of officers surrounded a shopping center in this community about 10 miles from Fort Lauderdale, said Pembroke Pines Deputy Police Chief Mike Segarra.

More than 400 law enforcement officers and at least two Blackhawk helicopters had been scouring South Florida for the suspect in the killing of 52-year-old customs agent Donald Pettit.

The agent was with his 12-year-old daughter when he was shot during a fight Tuesday morning in a post office’s parking lot in nearby Pembroke Pines. Authorities did not immediately know if Wonder, a Miramar resident, had an attorney.

Police received an anonymous tip that led to Wonder’s arrest, but Segarra said Pettit’s daughter was instrumental in identifying him.

“She’s the star,” Segarra said. “She is strong. She is something else. With her, and the tip we received, justice was served.”