What they might do
is make a trial of Iraqi and US Military people in the court. It will not be a US Court, it is an Iraqi matter. The Military won't want to give up control, so they will send their own people to oversee the trial. Besides they will say that the Iraqi government hasn't been set up yet and need the US Military to help them out.
"Lady I only speak two languages, English and Bad English!" - Corbin Dallas "The Fifth Element"