"and its owner, too, shall die": at the hands of Heaven. You say at the hands of Heaven, but perhaps at the hands of man? It is written (Numbers 35:31) "You shall not take kofer (ransom) for the soul of a murderer, who is liable to death" — Redemption is not given for those who are put to death at the hands of man, but (only) to those who are liable to death at the hands of Heaven.