This man is guilty and whatever excuse he has is as lame as his knowledge of the business.
The only way you know 100% for sure if he is guilty is if you had your fingers in the cash till as well.
Keep fighting the battle Mike. You have plenty of supporters out there. They are only picking on you because you are an Expat, and no other person that held your position has won as many awards in the time that you did.
The only thing you did wrong was to make them look bad.