Charity trustees Mohammed, Saleh, Abdelelah and Ahmed bin Mahfouz are reported to have denied knowledge of Kahlid - their brother - when first approached by investigators. The four are based in Saudi Arabia and have registered addresses at the Saudi Economic and Development Company that controls the IDF and which also has offices in Curzon Street. Meanwhile US military police are today preparing to hand over American Taliban member John Walker Lindh to civil authorities for prosecution. Lindh, 20, faces life in prison after being charged with four counts of aiding terrorism, including conspiring to murder American citizens abroad.