If you use a statuette, does that effect the skeleton's alignment as well as your own? Perhaps try using a spider statuette and lead the skeleton into some soldiers, to see if they will attack it. Just changing form and turning back may conceivably reset whatever is wrong with the skeleton.
Did you try using the Banish spell on him? I'm not sure if that will work, since he is not following you due to Aura of Command, but it is worth a shot.
Have you tried using an area effect spell that doesn't need a target (such as Hell Spikes or Poison Cloud) to see if you can kill him? Cast the spell near, but not directly on him, so he doesn't turn hostile.
Check your PM (click '
My Home' in the top menu bar, then 'Received Private Messages').
