Social activist Anna Hazare has said, Delhi Chief Minister Arvind Kejriwal should have checked the antecedents of his Principal Secretary Rajender Kumar whose office was raided by CBI over an alleged corruption case. Talking to reporters at his native place Ralegan Siddhi in Maharashtra, Hazare said, instead of fending off allegations now, Kejriwal should have checked his background earlier. He, however, questioned the timing of the raid.<br/><br/>The office of Kejriwal's Principal Secretary was raided by CBI on Tuesday triggering a fresh face-off between the Delhi government and the Centre. The Delhi Chief Minister claimed that his office too was raided, a charge denied by CBI as well as Finance Minister Arun Jaitley in Rajya Sabha where the Opposition created an uproar.