A Kenyan parliamentary report into the 1990 murder of former Foreign Affairs Minister Robert Ouko has called for the investigation of top officials.
Mr Biwott was Kenya's most powerful politician under Mr Moi
Among these mentioned are Nicholas Biwott, a powerful cabinet minister during the regime of Daniel arap Moi.
Mr Biwott has denied any involvement. He refused to answer questions during the inquiry.
The report says Mr Ouko's murder followed a row with his cabinet colleagues over corruption allegations.
The report, the fourth to investigate the murder, did not name the killers.
Mr Ouko's body was found three days after he disappeared, having been shot, doused with petrol and set alight.
He went missing from his farm in western Kenya shortly after returning from a trip to the US and his death was initially described by the Moi government as suicide.
Several key witnesses in the investigations into the murder have also since died, some of them in mysterious circumstances.
And now the parliamentary committee recommends that their bodies to be exhumed in order to determine the causes of their deaths.