See report from the CBC below. The question of diplomats seeking refugee status or committing crimes and asserting immunity from prosecution has is a thorny one: over the last few years, there have been dozens of incidents where members of the diplomatic corp have hidden behind immunity, yet they are quick to use our laws to gain protection when their friends at home are ousted. Canada is not the only country with the problem, but it certainly could make diplomatic immunity more limited and not extensible to family members. Right now, when a diplomat commits a crime, the only remedy is to have his country recall him, or to expel him.
Expelled Libyan diplomats claimed refugee status in Canada - Politics - CBC News