Five years for a punch, but only one for a death?

The scales of justice have gone way beyond just being askew, they have been completely knocked off their mooring. A low/middle class black female receives a five-year prison sentence for punching an elderly white woman in the face, which undoubtedly caused some physical and emotional trauma, yet did not have a life-threatening or lethal outcome.

An upper-class, renowned white physician driving home under the influence runs down an innocent white teenage girl, resulting in her death, and receives a one-year prison sentence. I admit I am not the brightest bulb on the tree, so I need someone to explain to me the ethical, legal and moral logic implemented in arriving at the decisions surrounding the outcome of the two aforementioned criminal acts.

John V. Hari