BINGO! That's the first thing I thought when I heard about a .223 being used. It's amazing how they decided it was a .223 without a piece of brass.
Why would they need brass, when they have the actual projectile?
(in two cases, relatively intact)
As though there aren't about dozen bolt actions chambered for the round...
The one shot, one kill method suggests a bolt action. Suddenly, all of us who own bolt actions are now considered terrorists, never mind one's ah, religious dogma that might call for the slaying of us infidels.