On may 21,1994, during a hard-fought campaign to elect delegates to the nigeria nationnal constitutional assembly convened by military dictator of the time,Four traditional rulers of the ogoni community were brutally murdered in unexplained circumstances.Ken saro -wiwa, leader of movement for the survival of the ogoni people,a harsh critic of the military regime and a candidate for the assembly, and thirteen other members of MOSOP, were charged with the murders and tried before a specially constituted military tribunal