An important step was taken on Friday in the ongoing struggle to stick the final knife into impunity for crimes against humanity committed by the government of Argentina during the Dirty War. Carlos Menem's universal pardon of the military and police in 1989 has been ruled unconstitutional in the case of General Omar Riveros.
The Menem pardon was given after a series of revolts led by a group of elite soldiers known as the Carapintadas. In other words, it was obtained under duress. It is black letter law that a contract obtained under duress may be voided by the party signing it. I cannot believe that the threat of forcing the nation of Argentina to become a charnel house under the military again could be construed as anything less than duress.