It will be anti-money laundering. Hes either buying or selling BTC to drug dealers / organized crime.
A guy called BurtW was arrested years ago for for trading on localbitcoins. They charged him with operation of unlicensed money transmitting business, and it cost him a fortune to clear his name.
I was arrested for trading Bitcoins, on Localbitcoins.com, in Colorado.
So far defending myself has cost our family almost $200,000
We can use all the help we can get, please see the fundraising web site put up by my wife Jean:
http://www.burtw.com