LONDON -- The general who headed the U.S. military prison at Abu Ghraib said in an interview broadcast Tuesday that there had been a conspiracy to prevent her knowing about prisoner abuse at the jail. Brig. Gen. Janis Karpinski, who was suspended by the Pentagon in May, has denied knowing about any mistreatment prisoners until photographs surfaced at the end of April. U.S. investigators have not implicated Karpinski directly in any of the abuses.