That's what it sounds like to me. Too busy shooting the place up to notice the cop that closed on them from the rear. Sounds like the cop had the element of surprise and was close enough to do what he had trained for. It's hard to know what his weapon was as some reporters call all duty weapons revolvers. In a close range engagement I'm going with a full sized pistol and a few spare mags every time.

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That's just somebody talkin.