5 month investigation... I would say the military was making sure all its ducks were in a row.... that being the case... throw the book at him....
I agree with you FMC.. when this first broke .... it definatly felt fishy.
Here is an article that discusses at the end what they found:
Marine who went missing in Iraq charged
During fighting last month in Fallujah, U.S. troops recovered Hassoun's personal belongings in a box on the third floor of a three-story commercial building. The property included an identification card, a uniform and a book.