Of course, it depends on the case at hand.
Once you confirm the initial suspicion that someone may have been involved in international crimes, the question is whether there is an extradition treaty in place. If you cannot extradite him or her, then of course there is the prohibition of refoulement, and you have to keep him or her in the country. I think that's where the crux lies, because that's the situation where Canada has to be able to prosecute, and that has obviously been a problem.