I think the other point to recognize here, though, is that not only does deportation contribute to human rights abuses like torture, but it doesn't further justice. If there truly are serious security concerns with respect to an individual, deportation will almost inevitably mean that they simply walk away scot-free at the other end of a plane ride.
A different approach is needed. If there is evidence, Canada should be pursuing criminal prosecutions. Our laws allow it. Our laws should be used. If there is not and deportation is not possible, then release is what should be pursued.
This issue of length has been highlighted by the UN Commission on Human Rights, and this is where I'll end by bringing this to your attention. Last year probably the most specific recommendation they made to Canada in looking at security certificates was that it is necessary to legally set a maximum length for such detention. That's a glaring omission in Canada's laws at this point, and certainly advice and recommendations from this committee to the government on that point would be much appreciated.