Sgt. Robert Bales

I hope someone has ordered an MRI. This kind of sudden personality change, whether alcohol was involved or not, and with some retrograde amnesia, screams brain tumor. A parietal lobe seizure might account for the actions triggered by such a tumor. In Afghanistan parasites would not be completely out of the question.

Remember the sniper on the U of Texas campus? The sniper was found to have a brain tumor -- presumably contributing to the behavior.