Almirón was present at the Montejurra 1976 massacre in Spain of two left-wing Carlists, in which the Italian neofascist Stefano Delle Chiaie participated. According to Spanish lawyer José Angel Pérez Nievas, it is "probable that Almirón participated — along with Stefano Delle Chiaie and Augusto Canchi — in the 1980 bombing of the Bologna train station" in Italy. On behalf of the "Partido Carlista de Euskalherria-EKA" and the Montejurra victims, Pérez asked a Spanish judge to have Almirón tried for the Montejurra murders.