Really sorry to hear that Peng, good luck man. Don't do anything that's gonna wind you up in the hospital or in jail. You can facilitate karma, but sometimes you just have to let it run it's course naturally, especially when it involved "powerful people." ((aka, losers with too many loser friends all willing to goto prison for eachother))

I don't have any answers for you, but I wish you the best with it. Losing 850 bucks prolly hurts pretty hardcore.