The first officer on the scene that morning, Lt. Kallop, has not been charged either. Doesn't that seem strange unless some kind of bargain was struck? Here's a bit about him from the Vanity Fair article, Rules of Engagement.
Within minutes [after the IED exploded] the force from Sparta Base arrived. It was a squad of about the same size as Wuterich's, led by the only officer present on Route Chestnut the entire morning, a young lieutenant named William Kallop. Like other lieutenants in Kilo Company, Kallop was junior in all but rank to the senior enlisted men, to whom he naturally deferred. He had a reputation of being a little soft, a little lost. He was the pleasant son of a wealthy New York family, who had joined the Marine Corps, it was believed in Kilo Company, to prove something to himself before returning to a life of comfort. As a soldier he was said to be average.
When the allegations against Kilo Company surfaced in the spring of 2006, his parents vigorously reacted. They hired a New York public-relations firm that specializes in legal cases, and then engaged a defense attorney who is a former Marine general and was once one of the top lawyers in the Corps. The implicit warning may have had some effect. While McConnell and Chessani were humiliated and relieved of their commands, and Wuterich was fingered in public, Kallop was left untouched, though technically upon his arrival at Route Chestnut on November 19 he had become the commander on the scene.
All officers are going to be allowed a chance to apoligize in writing and resign.
The enlisted will be hung from the yardarm.