The Conrado Niemeyer case refers to the death of a Brazilian businessman detained on 24 July 1925 by the 4th Auxiliary Police Bureau of the Federal District. Conrado Borlido Maia de Niemeyer, born in Rio de Janeiro on 5 April 1871, came from a family of engineers, industrialists, and military officers and owned Casa Borlido Maia e Cia. The police accused him of supplying dynamite to tenentist conspirators operating clandestinely in the capital. On 24 July, Niemeyer accepted the summons from the chief officer Francisco Chagas, of the 4th Police Bureau, to testify at the Central Police Building.