I too thought it was unlikely to be the actual victim but that made it even creepier to me.
Yes, an editor making the effort to find a stock image of a burnt human limb might be even creepier than using one of the actual crime scene, if it exists, which would just be gross and insensitive.
But it’s all click-bait to them.
That wire looks like tire bead. I'd guess that's a necklacing victim.