Sir — This refers to the editorial, “AgustaWestland probe” (December 13). What comes as a surprise is that the arrest comes more than three-and-half years since the FIR was filed. One is not too sure whether his arrest, coming as it did immediately after the questionable appointment of the acting CBI Director, was merely a coincidence. One hopes Air Marshal Tyagi is not being used as a pawn in a larger political game.