Siino runs Nacho Mamma's in Bristol, R.I., seaside home of Roger Williams University.
"It's a burrito shop with high-end Mexican food at a low price," he told AOL News. Last Friday, the restaurant's busiest day of the week, a little girl approached Siino around 2:30 p.m., as the lunch rush was winding down.
She handed him an item for his lost-and-found, a gift bag from Mohegan Sun, a casino 75 miles south. He shoved it under the counter and forgot about it during his afternoon cleanup. When he finally peered inside, four or five hours later, he discovered an empty jewelry box, a receipt for a $28,000 engagement ring and $20,000 in cash.
Business has been slow, and Siino could have used the money, but he didn't pause before calling the cops. "I've been brought up in a good home, and that was the right thing to do," he said.
As the cops were tracking down the bag's owner via the engagement ring receipt, the owner, a professional gambler, was tracking down his bag to Nacho Mamma's, where he had stopped in for a bowl of Mexican-spiced clam chowder.
The man and his money were reunited. The gambler met up with Siino to thank him in person.
"He was a very calm person," said Siino of the gambler, who asked to remain anonymous. "He was very happy I did that."
So happy that he gave Siino one-twentieth of his cash: $1,000.
Siino took the gambler's money straight to the bank.