Harper has tried very hard to muzzle, or render ineffectual, the current parliamentary investigation, and I think in this case Amnesty International has it right:
We are, however, shocked, that at least 12 of his reports were not disclosed by the government during the course of Federal Court proceedings in 2007 and 2008, despite the fact that they were obviously of direct relevance to the issues before the Court and were certainly covered by requests for disclosure of documents that had been made by our legal team. Equally troubling has been Richard Colvin’s testimony as to the ways in which he indicates his reports were dismissed and ignored by senior officials. That your government has responded primarily by seeking to discredit and impugn Mr. Colvin’s credibility has been, frankly, wholly unacceptable.
In our view, therefore, there is no other option open other than to immediately convene a full, public Commission of Inquiry into all aspects of the laws, policy and practice that has governed Canada’s approach to handling prisoners in Afghanistan. We call on you to do so without delay.
The real issue here is what is the Harper Government trying to cover up? I can think of a few possibilities.