First, are there really notable numbers of wolves in the area? I see there are some occasional ones, but...All of this points to a wolf attack IMO. I don't think there is any foul play by a person.
Do the really attack humans? In human settlements? In broad daylight?
My country has notably more wolves than France and there has been not a single wolf attack on a human during at least 50 years, possibly more than 100 years.