If you forget to trace the Fiat heist ...
You can't trace fiat. You do not have tools to do so (but it would be nice if you had such tools). Only bank clerks and police can do it at the moment.
What bank clerks and police won't do is blockchain analysis (they neither care nor understand).
true, but there we go again with that ancillary mention that may turn out to be a pearl of wisdom in disguise -- 'no one talking about the fiat'
perhaps that is a different line of entry to be considered for authorities
in fact I read of one guy who indicated that he sold his btc, transferred it to fiat, requested a wire but it was never processed going back to October or November