This is about the shooting of former Pantera guitarist "Dimebag" Darrell in a Columbus night club in late 2004:
"A smoking gun in hand, now don't you realize what you've done
Put a bullet in his back, your hero since you were so young
How could you kill the man who brought salvation through your pain
He must mean everything to end it all this shameful way"
It's a tribute to Dimebag.