Brilliant crime thriller that keeps you guessing til the end. The fact that the story is based on a true story, moreover, the movie is scrupulously faithful to the real events, really gave me the chill. Everything in this movie is working, and it's working very well. Just to name a few: The cinematography, the acting, and the plot development. There are also a lot of poignant and captivating scenes that make the movie very compelling. It keeps offering questions instead of answers, that results in not merely a movie, but a truly engaging experience.