Can anyone offer any suggestion on beating this? Much appreciated.
If it goes to trial, ask the officer what sign you allegedly disobeyed. Ask if there are any "no left turn" signs. You can present photographs of the intersection showing that there are none and then show what you did. If the officer was sitting in the Tim Horton's lot, behind the Mac's, how the heck did she observe you make a U-turn on Brimley? I think the officer may have thought there was a "no left turn" sign. If so, the photographs should be enough to get it tossed. If you didn't make a U-turn, then it should be no big deal. Regardless, the "improper disclosure" tactic should be your first plan of attack.