Why do we separate the roles within the justice system?

Why do we separate the roles within the justice system?

Write a 750-1,000-word essay that addresses the following:

1. Why do we separate the roles within the justice system? Explain the importance of having a separation of authority, roles, and responsibilities in the Justice system.
2. Why is criminal investigation interrogation handled mostly by the police rather than the judiciary or corrections?
3. Explain how morality and ethics affect Police interrogation practices.
4. Explain how a police ethics code informs Police interrogation practices.

Be sure to cite three to five relevant scholarly sources in support of your content. Use only sources attached or government websites.