You don't know the rules, but you can probably hazard a guess.
In Toronto, a driver took their eyes off the road, reached for a water bottle on the floor, hopped the curb, hit and killed a pedestrian, and was found not guilty.
Well they said they were reaching for a water bottle. For all we know they were yelling "death to the sidewalk dweller" as they deliberately murdered someone.
In Canada, drivers are not generally held responsible for driving that is normally incompetent. So the defence would of wanted to establish that such incompetence had occurred. It had to be a mistake that anyone could make.
It's a a pretty big problem, but no one seems to care...