This director (Ric Roman Waugh) specializes in gritty crime dramas about prison system and its failings/ draconian realities. Since I recognized the style I checked, and yeah what do you know, its the same one who made, Felon from 2008, quite good and really underrated one too (even uses same actors in some of it too, Jon Berenthal, Benjamin Bratt and several others. And Snitch, who had potential and similar plot, but had its gravitas kinda semi-ruined by starring The Rock who sticks out too much...
Compared to Nicholai Coaster-Waldau who is flatout amazing in Shot caller, by far the best movie of the 3, these other 2 was good practice to make it seems (very similar themes).