You do not think a mother killing her own child is punishment enough? It's very unlikely she intentionally planned to kill her child in this manner to cover it up as an accident.
Besides backup cameras have use beyond just making sure a child is not behind you, such as assisting with parking, or seeing if there is oncoming traffic when there is a larger vehicle parked next to you.
Besides backup cameras have use beyond just making sure a child is not behind you, such as assisting with parking, or seeing if there is oncoming traffic when there is a larger vehicle parked next to you.