No rhetorical flourishes: this work-in-progress is intended to provoke a long-overdue public dialogue on an ugly topic that refuses to stay disappeared. It treats a hidden battleground of Argentina's Dirty War (1976–1983), a ‘petite war,’ a war within the war, directed by a military-appointed doctor against the mentally deficient inmates concentrated at the national psychiatric hospital, the Colonia Nacional Dr. Manuel A. Montes de Oca in Torres, and its sister institution, the Colonia Psiquiátrica Domingo Cabred, in Lujan, both in Buenos Aires province. Buried in the historical, statistical, legal, and archival records, along with the key informant interviews, ethnographic observations, and photos is shattering evidence of medical human rights abuses committed under the necropolitics of the Dirty War against an abandoned population of mental “defectives” who were condemned to gratuitous suffering and early deaths at the psychiatric colony (see Figure 1). In the worst instances, the abuses were crimes against humanity.