Lets not confuse the Iraqis with the Afghanis. Iraq is a very civilized nation. I seriously doubt any American POWs were executed or used for target practice. It was probably a very quick ambush from close range, the Iraqis had time to aim well whilest the Americans never knew what hit them. They most likely grabbed the girl and a few others and hauled them back to base after the short gun battle was over.
Its easy to speculate, but realistically, the Iraqis know they cant win, so I dont imagine they will be wanting to commit lots of war crimes. They have cared for POWs so far, and I imagine they will continue to do so.
But I am very very glad this girl was rescued. I don't believe combat is anyplace for a teenage girl.