The Hybrid tribunal is a system that share judicial accountability jointly between the state in which in fuction and the United Nations. Based on "the lesson learn" from the international Criminal Tribunal for the former Yugoslavia (ICTY) and the International Criminal Tribunal dor Ruanda (ICTR), the hybrid model endeavor to combine the strenghts of the ad hoc tribunal with the benefits of local prosecutions. The hybrid model's greatest risk is that rather than incorporate the best of the international and local judicial systems, it may reflect the worst of both. This article identifies the weakness in East Timor's hybrid tribunal and examines the underlying causes. Two big question in this article are : First, its the theoritical ideal of the hybrid model attainable in practice? Second, is a constrained judicial mechanism preferable to none?. The critical analysis affered by this article is motovated by a desire to understand the weaknesses of the tribunal so that they may be avoided in the future