Американизируй меня, American Me (1992) ENG

It focuses on Santana, a teen who, with his friends Mundo and J. D., form their own gang. They are soon arrested for a gets into trouble again, going straight from reform school to prison. He spends eighteen years there, becoming the leader of a powerful gang, both inside and outside the prison. He is finally released. Once out, he tries to relate his life experiences to the society that has changed a lot since he left it 30 years before.