Firstly, until now no one know if Tether and Bitfinex actually belong to the same person...

“Our investigation has determined that the operators of the ‘Bitfinex’ trading platform, who also control the ‘tether’ virtual currency, have engaged in a cover-up to hide the apparent loss of $850 million dollars of co-mingled client and corporate funds. New York state has led the way in requiring virtual currency businesses to operate according to the law. And we will continue to stand-up for investors and seek justice on their behalf when misled or cheated by any of these companies.”