"Somebody got shot in the parking lot, " Nadine Riggs shouted frantically into the phone to a 911 operator. "There is a little girl in the car and her father is on the floor. I don't know if he's dead."
The operator tried to get information out of Riggs, who had just witnessed the shooting death of Donald Pettit, who worked as a U.S. Customs and Border Protection agent.
Police say James Wonder, 65, of Miramar shot Pettit once in the back of the head on Aug. 5 in the parking lot of the U. S. Post Office at Dykes Road and Pines Boulevard in Pembroke Pines.
He was arrested a day later in a Davie dialysis center after a 30-hour manhunt.
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Police released 911 tapes Monday, showing five calls.
One caller, who identified himself as "Cliff, " said he heard a shot, but did not witness the shooting.
"I pulled into the parking lot and it had already occurred, " he said.
Cliff calmly went on to say, "There is one man shot. I believe he is dead."
The two men apparently began arguing while driving in the area. Pettit, 52, followed Wonder into the post office parking lot, where Wonder pulled out his gun and fired one shot, police said.