A 1992 US Congressional investigation included as a "matter for further investigation" that "The relationship of important BCCI figures and important intelligence figures to the collapse of the HKDG and Tetra Finance (HK) in 1983. The circumstances surrounding the collapse of these two Hong Kong banks; the Hong Kong banks' practices of using nominees, front-companies, and back-to-back financial transactions; the Hong Banks' directors having included several important BCCI figures, including Ghanim Al Mazrui, and a close associate of then CIA directorWilliam J. Casey; all raise the question of whether there was a relationship between these two institutions and BCCI-Hong Kong, and whether the two Hong Kong institutions were used for domestic or foreign intelligence operations."[1]