Not a thing.
I'm wondering if "the body is in too poor condition to determine whether the ID is accurate" is an understatement.
But like I said, Steven's dentals are readily available (I even have some of them, sent to me cc: due to a UID I asked about a few weeks ago). I'd think they could have easily ID'd Steven, if this were him.
I agree. Seems unlikely it's Steven. They would have dentals and no problem notifying next of kin.