Film Review: The Last Castle

Lieutenant General Eugene Irwin (Robert Redford) is brought to a maximum security military prison to begin a ten-year sentence for his decision (in violation of a presidential order) to send U.S. troops on a mission in Burundi, resulting in the deaths of eight soldiers. Colonel Winter (James Gandolfini), the prison's commandant, is a great admirer of the general but is offended by a comment he overhears: Irwin criticizes Winter's much-prized military artifacts collection, calling it something no actual battlefield veteran would ever have.
Winter, who has never seen combat, resents the remark. He then takes exception to what he perceives as Irwin's attempt to change the attitudes of the prisoners, his admiration for Irwin fading fast. On one occasion, Irwin is punished harshly after stopping a guard from clubbing a prisoner, Corporal Ramon Aguilar (Clifton Collins, Jr.), who had made the mistake of saluting Irwin in the prison yard.
Continuing to observe acts of cruelty, Irwin attempts to unify the prisoners by building a "castle wall" of stone and mortar at the facility, which in many ways resembles a medieval castle. Envying the respect Irwin is clearly receiving, Winter orders his guards to destroy the wall. Aguilar, directly involved in its construction, takes a stand before the bulldozer. Winter orders a sharpshooter to fire a normally non-lethal rubber bullet directly at Aguilar's head, killing him.
After the wall is destroyed, Irwin and the inmates pay final respects to Aguilar in formation. Winter later tries to make amends with Irwin, who calls him a disgrace to the uniform and demands his resignation.
The prisoners begin to behave like soldiers around Irwin, using code words and gestures, infuriating the commandant. Winter reaches out to an anti-social prisoner named Yates (Mark Ruffalo), a former officer and Apache helicopter pilot convicted of running a drug-smuggling ring. Yates is bribed to inform about Irwin's plans in exchange for a reduced