Remains of 215 children found at former residential school in British Columbia
This is one incident among many, but it has less to do with indigenous children as it does with any system wherein the accounting of "disconnected" children is left to that system.  Tuam, County Galway ... eight hundred infants with missing graves.  St Mary's Cemetery in Lanark, four hundred left in a single mass grave.  In Germany, nuns pimping out orphans.  The Sisters of Mercy scandal.  I could go on.Bluntly put, when an institution is given power over children, more than that of a family, and the auditing is lax, you're gonna get maltreatment, and from there unmarked graves.    Indigenous, orphans, those "born out of wedlock" in the old days, any child prised loose from the family is at tremendous risk of physical abuse, sexual molestation, death, and discarding.I'm not sure what it says about the human race in general but it isn't very cheery.