This thesis considers the extent to which the International Criminal Court's Office of the Prosecutor ('OTP') has been successful in realising its self-defined mandate of ending impunity in Kenya. In particular, it focuses on the OTP's attempts to encourage domestic investigations and prosecutions as part of its strategy of positive complementarity. This strategy has been hailed as being the best and perhaps the only way that the OTP may use its finite resources to make a significant contr...