From what I've read, administrative segregation in Canada is more about protecting other prisoners from a dangerous prisoner - not so much protective custody. PC certainly does exist (I think it's still called Admin. seg.). But, to my surprise, it's not an automatic thing for high profile offenders. There are other murderers in the general population too. I would've thought a guy like Garland would've gone straight to PC - but obviously that's not the case.
I'd be really surprised if this happens again - but then I was surprised the first 2 times it happened. Perhaps the resources to house a murderer in his own comfy, secluded, protected little area of the prison just isn't something they immediately have the resources for? I just don't know.