I saw a dwarf steal an artifact, I was curious about who he was bringing it to because there was no one in the other creatures tab who seemed reasonable.

So he gives it to this dead body I had killed earlier and it says it's in his possession when you looked at in the objects menu!

To recreate, load this safe, follow the dwarf on screen, and watch as they slap an artifact into the aether via a dead body; it'll only take a few seconds

I had to use a set up with necromancer citizen to revive and kill him to get my artifact back, it was cool tbh but I highly doubt it's intended.