KARACHI - Sindh Polices Special Investigation Unit (SIU) on Tuesday arrested Additional Director Federal Investigation Agency (FIA) Ahsanullah, from Clifton, sources said. The accused is involved in a murder case. Earlier in the day, a court had cancelled Ahsanullahs bail plea but he managed to escape from the court premises with alleged support by some lawyers. Later, both the police and the lawyers had got registered FIRs against each other. The accused is charged in the murder of Shabbir Rehman alias Shabbir Supra who was killed on October 12, 2007. Ahsanullah was nominated in the FIR No 392/2007 registered on the complaint of the victims son Arsalan Sipra. Shabbirs beheaded body was found from a Flat No A-16 Boat View Apartment Clifton.