Regardless of whether Adnan is guilty or not, it's proven many times that the justice system is broken. Many people consider it as sacred but in reality, it's just a man made system and doesn't always become successful in delivering justice. It works on the ability of people to present the truth in order to serve justice, but people can be biased, easily manipulated, and influenced. This includes everyone in the justice system. The many innocent people, who were put in jail and later exonerated, and the people who were let go freely even though they were guilty, are the biggest proof of it. The system prefers the rich and powerful. If you have the money, you can hire the biggest lawyer with the biggest mouth, whether you are guilty or not, and that lawyer will try to manipulate the system to prove your innocence.