There have over time been a number of efforts made, though not as co-ordinated and not on a national scale like this. For example, there have been known situations in Regina where there was a “discovery”, and I think that's a loaded word in this context, because there are many indigenous communities that say, “We told you all along that people were there.”
It is of note that when the Kamloops band went and looked, they looked in only one place; they didn't have to look all over. They knew exactly where to go; they went to that one spot.
There have been many instances where remains have been found—55 sites out of 131 so far—but it has not been done on as organized a basis as this. Even at Kamloops, there was work done in the 1990s originally, or least most recently prior to the events of this past week and this past year.
Yes, work has been done.