This study aims to defend the institutional reform of Brazilian police as a key mechanism of transitional justice, attuned to the modern phase of the transitional justice project that seeks to put together transitional mechanisms, and the needs of the society they are applied to, with the main purpose of promoting positive peace whilst reconciliation and reduce antagonistic social identities and recognizing the material effects of conflicts to achieve feasibility of forgiveness. It s necessary to recognize that Brazilian society is heavily militarized and that this militarization is a consequence of the specialized anti-communist propaganda and dissemination of national security doctrine promoted by the military government to effectively include Brazil in the global capitalism under the leadership of the United States. The transition to democracy will not be complete without the destruction of militarized gears that continuously facilitate torture, extermination and jolt the free exercise of political rights for Brazilian citizens. The military presence in the domestic public security, management and control of the military police is a dictatorial legacy that hinders the democratic development of the police institution in pursuing minority protection and safeguarding the free exercise of fundamental rights. The reform intends to contain the repetition of serious human rights violations perpetrated by the police, recognizing that antagonistic group identities - yesterday communist, today black and brown marginalized populations - facilitate the implementation of the elitist security project and maintenance of social inequalities in the neoliberal society.