Now that a supervisor at the Beauval Indian Residential School in northern Saskatchewan has been charged with abusing boys in his care, a former student and worker says he always suspected children were being abused.

Armand Fiddler told CBC News he never got over being at the Beauval school in the 1960s. He said he was never sexually abused during his time at the school, but he believes his brothers and nephews were.

For two years, Fiddler worked as an assistant boys supervisor in Beauval, directly under Paul Leroux, who's facing 13 counts of indecent assault against boys ranging in age from three to 18.

Fiddler said Leroux singled out a boy to sleep close to Leroux's room and believes that boy was sexually assaulted.

But Fiddler said he doubted anyone in the rigid residential school system would have listened to him at the time.

"There was no way for me to tell anybody anyway," Fiddler told CBC News. "I don't think I would have been believed anyway."

Leroux has already been convicted of abusing boys at another residential school in Inuvik, Northwest Territories. He will make his first court appearance on these latest charges next week.

In an email sent to CBC News, Leroux said many of his convictions in Inuvik were wrongful. He also denied any wrongdoing in Beauval, calling the charges "false" and "copy-cat" in the email. Leroux said the laying of the charges was irresponsible.

Police started their investigation in the Saskatchewan case three years ago.

Leroux is now 70 years old and living in Vancouver. He was arrested in late September.