The Queen, The Kamloops Kidnapping, The Witness William Coombes & The Murder of William Coombes

Says it all right there on the tin. In 1964, claims witness William Coombes, the queen visited his Kamloops residential school, & took the kids picnicing. Ten of Coombes classmates were never seen again.
Coombes died shortly before he was due to make a detailed statement to follow up the short one contained in this video. The witness at the end claims Coombes was murdered in a Canadian hospital.
A few years ago, Kamloops made the news after the school grounds were checked with ground penetrating radar which showed voids that could be the graves of secretly buried indigenous kids.