The only ones listed above that are somewhat realistic are Walking Tall and Colors. Another good one that is realistic is The Choir Boys. I fall into the class of people that usually, but not always, enjoy movies with realism over those that aren't realistic. BTW, I attended a training seminar one time with Sgt. Tom Harris of the LA County SO Gang task Force, who was the technical adviser for Colors. Robert Duvall and the old bull/young bull story is one of my favorites.