Car Owners to be Notified of Blackboxes in Vehicle
Actually in Canada you DO get off if the cop does not show up for the court date.
Further more, I once went with my friend who was fighting a ticket and got to listen to a couple of cases before his. On one of them, the guy was clearly speeding and didn't care who knew it. But when the officer was reading the details of the event, he read the date wrong. That is, it was written down correctly on the file but he (for some reason) said the wrong date. He corrected himself immediately but it was too late, the case got thrown out.