Just so it's clear, students staying in Canada on Student Visas do NOT have the right to vote in Canada. At least not yet, legally. And they do check ids in Canada when voting. So where they added to the voter registry illegally (easy enough to check) or did they fraudulently vote under alternate papers? Something here would have to leave a paper trail and should be possible to prove.
Just so it's clear, students staying in Canada on Student Visas do NOT have the right to vote in Canada. At least not yet, legally. And they do check ids in Canada when voting. So where they added to the voter registry illegally (easy enough to check) or did they fraudulently vote under alternate papers? Something here would have to leave a paper trail and should be possible to prove.