It’s been five years since the Tk’emlups te Secwepemc First Nation announced that it had discovered hundreds of unmarked graves in Kamloops, B.C., using ground-penetrating radar (GPR). The announcement sent shockwaves throughout Canada and brought the residential school controversy to global attention. Then prime minister Justin Trudeau ordered flags flown at half-mast at all federal buildings and they remained lowered for more than five months, the longest period in Canadian history. But in the years since the announcement, the Tk’emlups te Secwepemc has walked back its initial claims...