Alexey Ivanovsky, 36, was ‘clinically dead’ after skin on his head, back and buttocks was ripped off, and leg amputated.
Listed as killed, he was found living rough in the forest, but now his own family refuse to believe it's really him.
Sacred site up to 17,000 years old - believed to be gateway to the underworld - under threat from modern spray paint artists.
Police checking claims, with one suspect insisting she has been 'framed', and put under police guard after death threats.
The move comes amid hope of large-scale investment from Seoul into Siberia.
He is believed to be 20, born in the wild, never went to school, received no vaccinations, and was cut off from civilisation.
Actor is being awarded the Siberian Oscar (if he arrives to collect it) - but is also now wanted as a tourism guru after 'blunder' on Urals pollution.
Agafya Lykova rejects leaving her remote house even though debris from coming rocket launch could fall dangerously close.