To echo what has already been said,
Challenge both your employer and the police. Most importantly, DO NOT DO IT ALONE. Get a good attorney. Check to see if your union will provide one for you free of charge if not call around to different lawyers. Some will take the case and will only accept payment if you win and they take a certain percentage of the take.
Of course always remember that you did nothing wrong.
The Charter of Rights and Freedoms gives you the right to express yourself
2. Everyone has the following fundamental freedoms:
(a) freedom of conscience and religion;
(b) freedom of thought, belief, opinion and expression, including freedom of the press and other media of communication;
(c) freedom of peaceful assembly; and
(d) freedom of association.
In modern time this includes the internet.