Police on Friday arrested Col (r) Ehsanur Rehman, the former Special Branch official and the current Punjab Civil Defence director general, who is believed to be author of the fake intelligence memo about an alleged assassination plot against the Lahore High Court (LHC) Chief Justice Khawaja Sharif. Col Ehsan, however, denied to have signed the said plan while earlier he submitted his written statement to FIA. Source said that the government would coerce Col Ehsan to get a statement from him in its favour.