I want to hint that a body found died through unnatural means. Unnatural as in sorcery. I haven't decided on all the details, but I'm leaning towards odd burns that are somehow different from real-life burns (attested to by an in-universe medical professional). But I'm not married to the idea. I could also go with flies and other carrion eaters disregarding the corpse to a suspicious degree, or it decomposing at an unnaturally slow or rapid rate, or whatever.

What NORMAL thing about deadly injuries or decomposition can I turn around and make weird?