Well, I'm not from the USA but I'm watching a lot of TV from the US including news shows and documentaries like this.
To me, living in Europe, the justice system of the USA is comparable to countries the USA doesn't compare itself to. As it seems, corruption (especially in law enforcement) and therefore justice is a huge problem, not only in Manitowoc, Wisconsin. It's all over the USA and has a lot of its roots in the law enforcement system. In Europe to become a law enforcement officer you have to undergo a 3-5 year training before you're allowed to enforce the law by your own. In the USA (as to my knowledge) you can become a sherriffs office law enforcer simply by showing up at the office and have no police record (simply said and not in every state but still).
Also the US justice system of a jury (who are no experts in crime issues and the justice system) ruling if the charges lead to a person beeing guilty or not is just not practicable in the 21st century anymore. But in the USA you can't give a judge all the power on it's own like it is in France or Germany for example because judges are set-in by politicians to act the law on behalf of their political opinions. (See Trump/Kavanaugh) I'm not saying it's perfect in other countries, but it's a lot more fair and professional. Also it's a lot less affected from outside persons, politicians and opinions.
In the end this series puts a dagger in the heart of Wisconsins justice system and the law enforcement of Manitowoc. And that's about time! Something has to change in the US justice system.
This show is absolutely phenomenal especially because it's going waist deep into the material instead of just scraping the surface. It should open the eyes of every american citizen that something isn't right if a documentary tells you, that a person is allegedly falsly imprisoned the second time and the show empored by Avery's lawyer can privode evidence that shows that plainly.
I really hope this is eventually leading to solving the murder and imprison the people behind it including everyone who was in on this.