At midnight on 29 May 1974, fifteen armed thugs broke into the Partido Socialista de los Trabajadores (PST) premises in Pacheco and took six militants. Three of them — Oscar Dalmacio Meza, Mario Zidda, and Antonio Moses — were murdered. We reproduce here the speech by Nahuel Moreno, the next day, at national headquarters of the PST on 24 de Noviembre Street, in the neighbourhood of Once, at the funeral and rally of repudiation to the Pacheco Massacre.