Monster.

Let me briefly posit two interrelated movie recommendations. Check out Monster and then follow it up with Aileen: Life and Death of a Serial Killer. The latter is a documentary about the person depicted in Monster. The backstory is amazing. Among other things, the odyssey through the legal system is eye-opening; check out her lawyer who advertised himself on television as "Dr. Legal". In addition, the documentary will give one even greater appreciation for the Oscar-winning performance of Ms. Theron.