In a self-devised integrity experiment, Paul Kinsella dropped 100 wallets in various places around his hometown of Belleville, Illinois, to see who would return them. Each wallet contained $2.10 and a fake $50 gift certificate.

Kinsella eventually received 74 of the 100 wallets back, something local police lieutenant Don Sax found surprising.

"I think it's great that they did [return the wallets]," Sax said, "especially with such a small amount of money being in there."