Loki serves as Keller’s dark mirror. Where Keller acts on emotion, Loki acts on obsession. His tattoos, chain-smoking, and solitary existence suggest a man who has seen too much. Notably, Loki never tortures—but he also never saves anyone in time. His final discovery of the girl in the underground bunker, after the kidnapper (Holly) has been shot, is pyrrhic. He arrives only after the evil has been done. Loki’s tragedy is that procedural correctness wins the day but loses the soul.

(2013) is an American neo-noir crime thriller directed by and written by Aaron Guzikowski . It follows the agonizing search for two young girls who vanish on Thanksgiving Day, exploring the dark lengths a parent will go to for their children and the toll it takes on their morality. Core Premise & Plot

In the final analysis, Prisoners is not a film about finding missing girls. It is a film about what we lose when we try to find them by any means necessary. It warns that in the war against chaos, the first prisoner taken is always our own morality.

The core of Prisoners is its examination of "the war against God" and the breakdown of morality during a crisis. The film asks the audience at what point a victim becomes a predator. Prisoners (2013) - IMDb