I know there are a couple of things to add in order for the Crime script to work for attacking an NPC unprovoked. I had to also add a tag like 'CIVILIAN' to the NPC I was attacking and set the alignment to some form of neutral. The NPC being stolen from may also need a certain tag in order to react to crimes in the desired manner.
So your NPC that was being stolen from had some form of Neutral alignment or the thief had some form of neutral alignment?
And as far as the tags go, I've tried : HUMAN, GUARD, BADASSCIVILIAN, NOT_MESSING_AROUND, as well as every tag related to trader/merchant.
