Lieutenant Colonel Levonda Selph was in charge of an operation that moved weapons and armor to Iraqi Police and Soldiers. The logistics mission that Levonda Selph had to complete was open to corruption, and guns are some of the most sought after goods. There is no telling what Levonda Selph is being investigated for, but Levonda Selph and her General are named in charges that are being investigated.
I would not be surprised if Levonda Selph did trade weapons because of how much they are worth. Guns are very valuable as there is always a war, and people always need to be killed. There are so many willing people that would pay for small arms that it would not be hard to sell large amounts of weapons for extra cash. Levonda Selph may be just another person that is trying to make a living by any way possible.