After going through it, 14 NPCs have mood reactions to murderers using GetObjectFlags. Though mood doesn't seem to do anything except modify how NPCs respond to roleplay text prompts. This change will have NPCs responding with mood changes to murderers even if they are morphed, where before being morphed would bypass those mood changes when the player enters the room. I could fix that with a morphed check if it's necessary.

The exception to the standard is Jonas, who doesn't sell spells to murderers. He uses CheckPlayerFlag in player.kod instead so he isn't affected.