there is no law stating what you are saying, no matter how severe an accident is,
there would be chaos and outrage if we gave police the power to make up laws on the fly,
the police are already corrupt enough, things would get worse,
police can only enforce laws that are currently there, they can't make up their own as they see fit, and i am more then fine with that, that would be the last thing we need,
.
I would be surprised if transport Canada or the provincial equivalent doesn’t have the jurisdiction to suspend a truckers licence pending the outcome of an investigation. But I defer to others with more knowledge in this area.