 All four had adjudicated on cases in
which they had ordered the release of persons who had been sentenced to long terms of imprisonment, during the rule of the Armed Forces Revolutionary Council (AFRC) which had also been led by Jerry Rawlings in 1979.Following intense pressure on the PNDC government, a Special Investigation Board (SIB) was formed to investigate the murders.Samuel Azu Crabbe was appointed the Chairman of the SIB.