Happy to:
Conflict of interest examples: Prosecutor promotion or salaries tied to conviction rates. Impoundment and confiscation of private property without due process and subsequent sale of confiscated property for benefit of law enforcement agencies. For profit incarceration. Fines flowing directly back to courts and law enforcement agencies. Arrest quotas, etc.
There is a huge body of related studies and data accessible via the internet. Go to google and search on, "conflicts of interest within the justice system."
I started to give you some specific links, but as it turns out they are seemingly endless.