"Military induction and training tends to weed out the criminals and psychos and military leadership does not tolerate the presence of these types of people in their commands."
There have been quite a number of news posts on FR over the past few years detailing the following: lowering of standards / increase in waivers for recent enlisted into the Army, relaxing the rigors of Army bootcamp and lastly a surge in gang activity / petty criminality in the Army in general but in Iraq in particular. So for you to claim that the Army "weeds" the scumbags out, is misplaced faith. That branch has been doing all it can to keep them in with the inevitable bad consequences. Let's hope that this isn't one of them.
Maybe not as bad, but the Marines probably have the same problem.