'Justice' regarding 'crime and punishment' in our society.

Define 'justice' regarding 'crime and punishment' in our society. What is justice, in essence, within that framework? Punishment? Retribution? Deterrence? Correction? Protecting society from harm? Maintaining the status quo (a tradition and social order to be upheld and continued unchanged) and, if so, can it be separated from another concept, 'social justice?' Is our justice system 'just,' according to the definition you find relevant, and also, is it so according to its moral definition in our society? What can be the reason for 'injustice' (if there is any) within our justice system?