A layman, I'm looking at educating myself with the basics of law.
Relevant Law: Perhaps None Applicable. I may be wrong.
This content I have writes to present a legal principle with an example, and the lesson.
Principle: A person is not liable for a tort committed by his/her child except when the parent affords the child an opportunity to commit it.
Example: A mother takes her 7yo child with her in the car to the market. Once there, she kills the engine, engages the handbrake, and puts the car in gear. Then she goes shopping leaving the child unattended in the car. The child, in playing with the controls, sets the car in motion which then kills a pedestrian.
The lesson here is that the mother is liable in tort as she was negligent.
It appears to me the mother took all necessary precautions in engaging the handbrake, and putting the car in gear.
How is the legal principle established in this example?