If you were unaware of any accident and there was no damage caused to the vehicle, then you should be acquitted (i.e. found not guilty) of the offence following trial.
The officer would not be charged with anything, though if you feel strongly you could always sue him for malicious prosecution if you believe the charges were baseless and malicious and the matter is ultimately resolved in your favour (i.e. acquittal or charges dropped). However, this course of action would likely cost more time and money than it's worth, so unfortunately it's unlikely the officer would face any repercussions.
Even if you were found guilty, there may just be a fine of a few hundred dollars or so, perhaps a bit more. You would not get a criminal record since this is not a criminal offence. Any conviction would merely be a provincial offence conviction, and thus should not have any impact on your employment, ability to travel, etc.
As this is traffic court rather than criminal court, it isn't entirely necessary you have a lawyer, but if you wish for legal counsel to assist you through the process and have the funds to afford to retain a lawyer (or paralegal), then you are certainly entitled to do so and it may help your chances of success at trial.
Hopefully that answers all your questions.