In 1999, Pratt served as a Special Envoy for Lloyd Axworthy, Minister of Foreign Affairs to Sierra Leone and performed the same role for Axworthy’s successor, John Manley. He visited the war torn country on several occasions. He met and held talks with the former Sierra Leonean President Ahmed Tejan Kabbah, and former President Charles Taylor of Liberia, President Lansana Conte of Guinea. There were also meetings and consultations with other senior officials and diplomatic representatives including Revolutionary United Front leader Foday Sankoh. He wrote two reports - "The Forgotten Crisis" (April 1999) and "Sierra Leone: Danger and Opportunity in a Regional Conflict" (July 2001). His recommendations called for more Canadian aid to Sierra Leone and more direct Canadian involvement to bring peace to the region. He also suggested that Liberian President Charles Taylor be investigated by the Special Court for Sierra Leone for war crimes and crimes against humanity for his role in prolonging the regional conflict. Pratt also introduced the first legislation in Canada to certify diamonds under the United Nations sanctioned Kimberley Process to stop the trade in blood diamonds and to protect the integrity of the Canadian diamond industry. Similar government sponsored legislation was eventually passed by Parliament.