Is there really ‘no evidence of human remains’ at residential school sites?

Is there really ‘no evidence of human remains’ at residential school sites?

During the scrum after the French debate, Drea Humphrey, a reporter with Rebel News, asked Jagmeet Singh a question in which she referenced human remains at residential schools, saying that “these claims have been disproven by bands that excavated and remain unproven by those that have not.”