I’d call it in, plant my ID on it, and head for the Maui surf.
Let the relatives sort the mess out…
There’d be no point in taking pictures and then calling in the authorities. The only way they’s come is if you kept calling them, and then they’d come to arrest you, for perpetrating a hoax. Even if the body was laying right there, if the cops showed, it would be you that they hauled away first.
I don’t want to spend any time in jail over bigfoot. Or littlefoot.
So I would haul the body to zoologists at the U, never mention the word Bigfoot, just claim it was an identified animal I found, and let them sort it out. Oh, and I’d make sure to get a receipt.
That is all.