Wang Quanzhang files a legal complaint over his treatment at the hands of the authorities following his 'disappearance' in 2015.
Authorities pledged severe punishment, but some brokers skated with relatively light “reeducation” sentences.
Rights groups had urged President Donald Trump to utilize the Uyghur Human Rights Policy Act for weeks after it became law.
The raid comes as a top Hong Kong official warns that the primaries could run afoul of China's newly imposed security law.
