Cleanskin (2012)

After an unsuccessful mission when a load of explosives is stolen by the terrorists Ash and Paul, the British Secret Service Agent Ewan is assigned by his superior Charlotte to team-up with agent Mark and hunt down the terrorist before the elections. Ash had used a bomber in a restaurant to kill many people and Ewan has a trauma in this regard since his wife died in a terrorist attempt. Ewan track Paul and Ash down and in-between he kills a Muslim in an old building believing that he would be another terrorist. All his deadly actions are covered by Charlotte team until the day he discovers a locker key hidden inside the coat that belonged to the Muslim that he killed and he discloses a web of lies and manipulation.