"At 2 o'clock," he said, "we were out of money."
Workers offered IOUs worth nearly $40,000 to people who brought in guns after the money ran out.
Individuals were allowed to turn in up to three weapons and were paid up to $250 for each of them.
"There's 1,137 less guns than there were the day before we started this initiative," Chiesa said.
It leaves an untold number of weapons in the city, though.
Camden, with a population of 77,000, has had 67 homicides in 2012.
That is also a dismal record, well above the 58 killings in the city in 1995.