Nope - my instinctive response to this sort of case is usually *not* to believe the police version - or at least to treat it with a healthy degree of scepticism. I grew up in an era when the police were (at best) 'flexible' and often worse.
But things just look 'wrong' here - would you drive off over a PC's foot when he was ticketing you? Would you not stop for 8 miles? Would you not exit the car pretty damn quickly once you had been brought to a halt?
The fact that the man was an OAP with a disabled badge is irrelevant - he behaved dangerously, suspiciously and stupidly. The police reaction was violent, yes I agree that, but how could they know what this idiot was going to do next?