I wouldn't worry about the terminated manager. He cannot press charges (criminal) because he was not the victim of a crime. He cannot sue (civilly) because he didn't lose his job for "theft" - he lost it for allowing it to happen under his watch. In addition, a civil court would find that a patron has no legal duty to employees to act in a way that prevents them from being terminated.

As for the earlier suggestion of contacting an attorney, I would always recommend it because a competent lawyer (notice the key word - not "a recent bar exam graduate lawyer") can issue the apology without it being a trap for still bringing charges.