http://www.theglobeandmail.com/news/national/watchdog-warned-of-csis-data-access/article12699140/
The watchdog agency that sounded the alarm on Canada’s metadata surveillance program has also raised red flags about how that intelligence is exchanged with CSIS.
Newly obtained correspondence shows that retired Supreme Court judge Charles Gonthier worried that mass-collection surveillance methods could blur lines between domestic- and foreign-intelligence gathering in Canada, by muddying the mandates of the Canadian Security Intelligence Service (CSIS) and the Communications Security Establishment Canada (CSEC or CSE)...
...To this end, he sent a flurry of letters to top Ottawa security officials five years ago. Mr. Gonthier, who then worked as the watchdog for the CSEC, urged continued walls between agencies – especially when it came to sharing the fruits of surveillance programs.