No action taken
Reason: I don't see anything that is a dead give away.
The first kill is, or could be, sound. The part that confuses me the most is that one bullet AK shot he fires at the terrorist behind the building. Perhaps mistaking him for a CT. It was just odd he looked straight at him and fired a bullet. The commanders death is a little odd in that his recoil looks bizarre.
I don't think there is enough proof in the demo to ban him I'm afraid.