This video, captured on a Syrian battlefield shows a rebel crouching in the brush calling in backup.
However, a trained eye from afar is locked in on him. In the blink of an eye, the sound of a gunshot goes off and the Commander goes down.
This is not believed to be a U.S. backed rebel. There are many rebel groups in Syria, some backed by other nations such as Iran, Saudi Arabia and more.
Watch this video closely.