Political activist David Matsanga has filed a petition to compel the government and the International Criminal Court to make public the contents of the Waki report on the 2007-2008 post-election violence.
Mr Matsanga says he has filed a case at The Hague-based court and needs the report to advance his case.
The 529-page report was produced by the Waki Commission and presented to President Mwai Kibaki and Prime Minister Raila Odinga in October 2008.
Although the Waki Commission did not publicly disclose the alleged perpetrators of the violence, the commission gave an envelope containing the names to Kofi Annan, who brokered a power-sharing agreement between Mr Kibaki and Mr Odinga.
In early 2009, Parliament rejected an amendment Bill for a special tribunal to try the suspects. Mr Annan then handed over the envelope in July 2009 to Luis Moreno-Ocampo, the then chief prosecutor at the ICC.
The ICC opened its investigations into the violence in March 2010.