The idea was suggested, and is now currently being looked at in more detail, because of the sharp rise in immigrants arriving in Alberta & the sharp increase in crime broadly thought to be connected to that.
I am NOT suggesting that there is a disproportionate amount of crime (of any sort) linked to recently arrived immigrants.
What I AM saying is that there are types of crimes that tend to stay "within the community" that only comes to our attention when members from that community ask law enforcement for help. (For example, over the last few years, there has been a dedicated/persistent threat of blackmail & arson within a certan SE Asian community)
Or about 2 years ago now, when Edmonton Police seized several handguns from youth at West Edmonton Mall (multiple incidents) - including an incident that had 2 armed groups stalking each other at the mall, which resulted in an exchange of gunfire in one of the parkades
In the above incidents, those involved were mostly PR's or recently arrived immigrants.
I believe the suggestion was to make it easier for law enforcement to know who is a recently arrived immigrant, who has PR status, and who is a citizen - for the purpose of quickly starting deportation proceedings for non-citizens.
(This is literally just water cooler talk, I have no idea if it's substantiated in anything. Just office gossip)