Which Major and Commander of the Argentine National Gendarmerie was involved in a special military intelligence service of the Argentine Army that collected information on and infiltrated guerrilla groups, human rights organizations, coordinated killings, kidnappings, and other abuses?
Batallón de Inteligencia 601:  Its personnel collected information on and infiltrated guerrilla groups and human rights organisations, and coordinated killings, kidnappings and other abuses.
i don't know