Surveillance video shows a customer coming across the money and decided to do the right thing.
The security guard accidentally left an ATM cassette with $27,000 inside outside of a Credit Union.
George Condash saw the plastic box in the middle of the street and without hesitation, he decided to take the cassette back inside.
"It's not mine and any honest person, I would hope, would take it back in," he said.
Condash did get a reward for his honesty, but he won't say how much.