This text aims to analyse the main facts which happened at Indigenous posts of Minas Gerais State- The Indigenous Post Guido Marliere (PIGM) and the Indigenous Post Mariano de Oliveira (PIMO)- during the civil-military dictatorship, mainly between 1967 and 1973, time in which the Ajudância Minas-Bahia (AJMB), responsible for administrating the mentioned posts, was under Military Police of Minas Gerais State s control (PMMG). During this time one reformatory was built for said offenders indians be transferred from several regions of the Country to the defined territory of Krenak indians. A militarised troop was organised with police Indians known as Rural Indigenous Guard (GRIN). All the Krenaks and the ones confined in the reformatory were forced to move to a PMMG s property know as Guarani Farm. These facts directly hit Krenak s political culture, leading the Ministério Público Federal (MPF) pleading an unique collective political amnesty to benefit the Krenak indigenous people. This litigation was submitted to Minister of Justice in 2015. This text describes all these processes under the lights of researched documents stored at Indian s Museum and Indigenous Centre of Reference collections both part of Armazem Memoria portal, mainly the ones which allow knowing how tutelary institutions such as initially SPI (Serviço de Proteção ao Índio) and later FNI (Fundação Nacional do Índio) worked in that region, where several conflicts over land had happened.