She was in a chain of command. If they simply wanted to turn a cellblock or the prison as a whole over to Military Intelligence, they could have done so at any time.
The Iraq Survey Group (ISG) for instance has had control of some detainees who were related to WMD activities and still do.
http://www.freerepublic.com/focus/f-news/1132460/posts
An Army report into the abuses at the prison, written by Maj. Gen. Antonio Taguba, faulted Karpinski and other commanders in the brigade and its subordinate battalions, saying leaders paid too little attention to the prison's day-to-day operations.
Previous abuses of prisoners or lapses at the prison went unpunished or unheeded, the report found.
Karpinski's subordinates at Abu Ghraib at times disregarded her commands, and didn't enforce codes on wearing uniforms and saluting superiors, which added to the lax standards that prevailed at the prison, said one member of the 800th MP Brigade.
The soldier, who spoke on condition of anonymity, also said commanders in the field routinely ignored Karpinski's orders, saying they didn't have to listen to her because she was a woman.
Sounds like a hell of a lot more than Karpinski to me..
Granted, she will be held responsible for it..