I suggest that this has likely been resolved long ago.
The efficient timeline would be an admissibility hearing completed in under 2 months time
The adjudicator (judge) has only 2 options in such a case, either accept the allegations in the report with the evidence of working without authorization or find he was working with a permit. It would not matter about a reason why working without authorization.
So if found described an order must be issued and where no other allegations exist it can only be an exclusion order which results in removal from Canada with no return without ARC for a year.
Also the other work permit application would be refused since he is now inadmissible to Canada.