He reached down as she came closer, taking the bill. The next moment, the camera was moving around, and we saw a flash of a silver knife. "BITCH," he said.

"MOVE IN AND TAKE HER DOWN," the Captain said to his men.

The camera recorded the last moments of Alpha Mark's life; the camera showed the knife plunging into his heart before he fell to his knees. The last thing it showed was the pine straw as he fell face-down onto the forest floor.

The security controller shifted to one of the bodycams of a guard responding to the scene. They arrived twenty seconds after the order and surrounded a...