The Justice Thought & System & its Morals? Namo Buddhaya!

Here are my questions regarding justice systems &amp; their morals:


  Would it be skillful &amp; moral to report someone to a principle, a police
  officer, or any sort of authority when someone is being hurtful to
  others (such as killing, bullying, etc.), knowing that reporting them will most likely cause them suffering
  e.g. expulsion from school, jail time, etc?
  
  And also is justice skillful, moral and is incarceration moral,
  skillful in terms of the Dhamma?


Metta!
Justice system is driven by unskillful intentions, but a necessity to maintain society. Essentially any action rooted in hatred, greed or ignorance is not skilful. For many justice is a form of retribution for some action done by another which is based on hatred which and unskillful root.

If you are judge you are expected to judge justly.

Reporting crime one needs to weigh the karmic consequences one may willing to bear and impact or betterment it brings. 

If you are a witness brought forward by subpoena then you have to tell the truth. In many cases of coming forward to report a crime may not be skilful if it is motivated by hatred, greed or ignorance. Generally when coming forward one has sympathy towards the victim and hatred towards the perpetrator.