A founding master of martial arts school Heng Yue Yen Long Kwon was acquitted yesterday of a charge of intimidating a family on a bus. Au Yuet-sing, 54, had pleaded not guilty to one count of criminal intimidation. Deputy Magistrate Li Chi-ho acquitted Au as there were doubts over the testimonies of the prosecution's witnesses. The witnesses claimed Au intimidated them after they came into physical contact with him during the alleged incident on January 1.