No, if the police believe it wasn't his fault, thats the final decision yeah?
He didn't drive into it on purpose, obviously.
Actually, no, that's not how it works in this type of accident.
If he'd been hit in his car first, and had careened into other vehicles (the initial accident wasn't his fault) then it would be different.
It's cut and dried for the cops: avoiding anything, cars, people, animals, whatever, is irrelevant when one vehicle hits one or more stationary vehicles. Unless there are mitigating circumstances, which are hard to prove, and then often ruled out (such as mechanical failures).
Even then, they have to find someone at fault when property is damaged.
I've been in accidents where the blame was apportioned according to road rules - no logic played a part in it.
So even in this case, where logically, it wasn't intentional, the law is blind to that and it's simply 'one car hitting a parked car...'