Very briefly, on the admissibility of statutorily compelled statements—it's on page 30 in my brief—the basic legal reality is this: in some cases you are compelled to provide information to the police. In Ontario, under the Highway Traffic Act, if you're in an accident, you must provide a police report. You must provide details. You must hand over that information to the police.
The basic principle is that it violates section 7 of the charter to then have the state use that material that is extracted by legal force from you in your prosecution. Our courts have gone farther. Our Supreme Court, in R. v. White, has gone farther, and our Court of Appeal in Ontario has gone farther, to say that you can't use that forced statement, which was given under the pain of incarceration for non-compliance, even for the officer to form grounds to do something. It's that important to keep the state out of that sort of business.