This movie should be rated 100%! It shows the endless corruption in the court system with judges and attorneys and people being incarcerated unnecessarily.
There's some difficult portions, so I suggest pausing it then going back again. I've had my own experience with someone lying and getting away with it and taking away much of my life.
Al Pacino, at the end, giving his opening statement and letting the truth out, knowing he'll be disbarred is an example of a deeply caring person who cannot participate in that sick narcissistic way of life. But you'll see that it still feels better to tell these people off. Just make sure it doesn't make you homeless. But when the coast is clear, you let it out because it will cleanse you!