All this sounds very worrying but it would not be the first time that an accident report has been "doctored".
What about the insurance companies and the liability issue? With all the vested interests is there not a case for a totally independent body being called in to do their own investigation - ie somebody with no axe to grind?
I am sorry but at the risk of being accused of discrimination I just do not trust the French to produce an unbiased report!! I await the arrows!