A business unit of Arlington-based CACI International Inc. will argue Friday in a hearing before a federal court in Virginia that allegations of detainee abuse at Abu Ghraib should be dismissed, based on an April Supreme Court decision that abated a law used to hold human rights violators accountable…According to the filing, the District Court for the Eastern District of Virginia will address…a series of motions, including one made by CACI to dismiss for lack of jurisdiction claims made under the Alien Tort Statute — which allows district courts to decide civil cases brought by foreigners claiming violations of international law…Whether CACI's motion will be upheld is difficult to say, in part because the Supreme Court decision may not extend to cases involving U.S.-based companies.