Dog Pound
(2010)

Angel (Mateo Morales) is removed from the detention center for medical reasons after attacking a guard and being knocked unconscious in the ensuring struggle.

Davis (Shane Kippel) is murdered in his bed by the abusive prefects.

Davis' death triggers a riot, which Butch (Adam Butcher) uses as cover to try and escape. He makes it outside but is caught by the guards, who brutally beat him and drag him back inside.

Thanks Michael D!