[@Mattie_]

Sure. I assume you're just talking about some robes, a few magical items, alchemical ingredients maybe? The Dungeon Keeper mostly lets his minions do what they want; he only intercedes in extreme scenarios where they're actively fighting inside the dungeon and blowing stuff up, and things along those lines.

He wouldn't particularly care if you take somebody else's  stuff, whether they were dead or not, unless that person just so happened to be one of his favorites or you were creating a massive disruption doing so.