Our security services--RCMP and CSIS--are famous for overclaiming in terms of national security confidentiality issues; the idea that the person is going to get sufficient information isn't supported by the facts.
I sense some people think that since you must be a terrorist, you know why you're there. Millions of Canadians watching may think that they wouldn't do this to a good Canadian, so you must be a terrorist, so you know why you're there and you don't need them to tell you why.
The fact is, though, that people need to be presumed innocent until they're proven guilty. This is the foundation of our legal system. If that is the case, then they shouldn't have to guess; they should be told what the issues are. They should be able to deal with them.