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In this picture taken on October 22, 2019, then-17-year old high-school student Joseph watches footage from August 31, 2019, showing when he (not seen) and others were allegedly clubbed repeatedly with batons inside a waiting train after a team of riot police stormed into the Prince Edward subway station, causing him to need 14-stitches to close a head wound, a moment that has fuelled his desire to become a lawyer as he tries to sue the force. - Despite spending 48 hours handcuffed to a hospital gurney under arrest as he was treated, Joseph was not charged with any crime and no police officer has faced any sanction for their tactics inside Prince Edward station. (Photo by Anthony WALLACE / AFP) / TO GO WITH HongKong-China-politics-unrest-anniversary-student by Yan ZHAO (Photo by ANTHONY WALLACE/AFP via Getty Images)

In this picture taken on October 22, 2019, then-17-year old high-school student Joseph watches footage from August 31, 2019, showing when he (not seen) and others were allegedly clubbed repeatedly with batons inside a waiting train after a team of riot police stormed into the Prince Edward subway station, causing him to need 14-stitches to close a head wound, a moment that has fuelled his desire to become a lawyer as he tries to sue the force. - Despite spending 48 hours handcuffed to a hospital gurney under arrest as he was treated, Joseph was not charged with any crime and no police officer has faced any sanction for their tactics inside Prince Edward station. (Photo by Anthony WALLACE / AFP) / TO GO WITH HongKong-China-politics-unrest-anniversary-student by Yan ZHAO (Photo by ANTHONY WALLACE/AFP via Getty Images)