A 15-month investigation by the Guardian and BBC Arabic, published on March 2013, disclosed that "the US sent a veteran of the "dirty wars" in Central America to oversee Iraqi commando units involved in acts of torture during the American-led occupation. These American citizens could theoretically be tried by the International Criminal Court even though the US is not a signatory. But it would have to be referred by the UN security council and, given that the US has a veto on the council, this hypothesis is very improbable." Reprieve Legal Director Kat Craig said: "This latest exposé of human rights abuses shows that torture is endemic to US foreign policy; these are considered and deliberate acts, not only sanctioned but developed by the highest echelons of US security service."