A retired Hong Kong police officer has been charged with assault after striking a bystander with a baton during the 2014 Occupy movement protests . Former superintendent Franklin Chu King-wai, who retired in July 2015, was arrested on Monday and charged with assault occasioning actual bodily harm after he hit passer-by Osman Cheng Chung-hang with his baton in Mong Kok during the protest movement on November 26, 2014. Cheng lodged an assault complaint with the force’s Complaints Against Police Office. Police launched a criminal probe against the 57-year-old former Sha Tin divisional commander in February last year. Occupy leaders arrested and charged a day after Carrie Lam wins Hong Kong chief executive election The case is to be heard at West Kowloon Court on Friday. A person convicted of the assault offence could face a maximum penalty of three years in jail. Late Monday, Chu was seen leaving Mong Kok police station by car. A police spokesman said no illegal acts by any officers would be tolerated. “If an individual officer is suspected of committing illegal acts, police will definitely conduct investigations in a fair and impartial manner,” he said.