A SENIOR police officer was arrested yesterday by the Organised Crime and Triad Bureau for allegedly attempting to pervert the course of justice. Senior Inspector David Khosa, 32, went in the afternoon to bureau headquarters in Causeway Bay where he was questioned in relation to his conduct in another ongoing case. Another man, Brar Balkar Singh, 28, a shop proprietor, was also arrested. Both men were expected to be charged last night. Khosa is suspended from duty. He is on ICAC bail on charges that he accepted an advantage from murdered triad boss Andely Chan Yiu-hing.