Researchers across Canada are racing to shed light on a bleak part of the country's history: How many indigenous children died at residential schools, and where are their unmarked graves? From 1883 to 1998, nearly 150,000 indigenous children were forcibly separated from their families and sent to the government-funded, church-run boarding schools in an attempt to assimilate them. Once there, they were frequently neglected and abused. What happened at the schools was akin to cultural genocide," concluded a 2015 report from Canada's Truth and Reconciliation Commission. It also found that at least 3,200 students died at residential schools ... though the commission contended that the number was probably much higher and merited further investigation. In 2015, Prime Minister Justin Trudeau promised to implement the Truth and Reconciliation Commission's calls to action, [which include] creating a register of the missing children and mapping their graves. But nearly three years later, some say that a lack of resources and missing documents is inhibiting progress, increasing the likelihood that the relatives of missing residential-school children will die without knowing the fate of their loved ones, and that unmarked graves could be destroyed. School records were often destroyed or inconsistently kept. Officials also frequently failed to record the name and gender of students who died or the cause of death. Authorities even neglected to report the deaths to the parents.