Still try to help you. You may want to take care of the matter by retaining an experienced lawyer; $200-300 /hr rate is fairly reasonable. The record will get into the green card review process; such a record will not help. You may have to lie again, claiming that the money fell into your card, and you forgot to put it in and gave to the store manager.
There is not a reason for rewarding as you said, not in China, nor in U.S.