Quote Originally Posted by Borgib
Police observation is a credible witness to a crime.
True, but the speed of a vehicle isn't exactly easy to tell by sight. Sure they are credible witness to other crimes like assault etc. But 'I think he was going fast' just isn't enough to prove it beyond the required threshold.

Sure, the cop might have been able to tell you were going over the speed limit, but he needs a radar or video to back it up. Just saying someone is going over the speed limit is not going to satisfy the requirement of proof beyond a reasonable doubt in a criminal court of law.