There is ample provision in the Westminster system, of which Canada is a part , to object and dissent from any conclusions reached, and this would be done thru the mechanism of civil law. That is, a member of , say, the McLeod family took umbrage at the final conclusions, they have the option to go thru the courts to have that rectified, or /and re visited.
Another way, a member of Parliament could instigate a Parliamentary review, based on solid ground for dissent, ..
Or, even a Royal Commission could be called for, where by Uncle Tom Cobbley and all are hauled into Parliament before a committee and grilled over hot coals by senators and Members of Parliament , etc.
It isn't a dead end, the RCMP report, assuming the Westminster apparatus is operative, there are avenues of objection and re hearing.