There are lot's of unmarked graves everywhere not just residential schools
Shiloh church in Saskatchewan was a black community the graves were marked with large stones later during a cleanup the stones were removed by those not knowing why they were there. There is a group looking for funding to find the graves so they can be marked.
At the Regina jail executed prisoners were buried in what is now Wascana park the exact location remains unknown
https://kentondejong.com/blog/who-ar...n-wascana-park
Any old cemetery has graves that were only marked with wooden crosses long gone.
The real crime is those graves being undocumented every community cemetery has records and maps of who and where they are buried, are there records kept by the Catholic church?