Incarnate

Alexander felt the Pride, before he felt the pain. The company unleashed a full fury of flaming las gun fire upon their former comrade, and all of the Xenos nearby. Alexander felt himself lose something, but he didn't care. After two loyal guardsman had fallen to Alexander, a bolt finally destroyed the bones in his firing hand, and his story could be heard coming to a close.

Fluttershy and Applejack were the only two ponies left alive in the square, but when Alexander pleaded for help, the two darted off and into the town.
The Imperial priest approached Alexander, taking adequate time to mock his defeat. He grasped Alexander by the head and forced his eyes upon an all too familiar scene. Surviving ponies of all ages and conditions were being organized into neat lines against a wall, a small foal had just enough time to open his little mouth and dribble out an unintelligible question before the flamer guardsmen let loose their fury upon the Xenos.

Abandoned by those he once saw as righteous and caring, and having just witnessed the brutal murder of some 20 ponies and their children, Alexander bawled, much to the disgust of his former comrades. He knew they wouldn't stop, not until the whole town was dead, Alexander could hardly hear the father, speaking of dishonor and treason before the bodies of 2 formerly loyal soldiers.

The sentence? Alexander was dragged (las bolts can sever limbs) on his one remaining foot to an abandoned house, where he was sealed in from the outside world. Then the nozzles of numerous flamer a made themselves known in the windows, and bathed the broken man in liquid-hot Promethium.