I had a mod that allowed robbers in the game since they were missing from base game. The guy broke in and threatened my Sim. Since the police NPCs the mod also added (I think it's one of the Sacrificial mods) were pretty much incompetent, I ended up killing the robber Sim through the cheats, then reviving the guy only to lock him up in a room in my Sim's basement he couldn't get out of. Eventually, I just deleted the guy. The mod was really causing a ton of errors, so I deleted it when I did the cull post-Eco Living patch.
