I saved him from execution, killing off every guard and the headsman. only to have him run to the stairs by the armorer and cower until they respawned and proceeded to kill him. I've become a wanted man for nothing.
The way I would have liked the whole thing to go. Rogvir gets sacked from the guards. Starts hanging about the Winking Skeever talking about how useless the guards in Solitude are. Then after the Battle for Solitude he would become Captain of the Guards. He isn't as cool as Sinmir is but I do like the guy for saving the High King from execution.