I had seen this a few years back, Usually "true crime" like stories aren't my thing, neither is stuff about serial killers (outside of the natural curiousity that one has about such infamous people)

As far as this movie goes - I was very impressed at the time on how they managed to work the story so that you got more of a full unbiased story as you might have gotten in the media. A big part of that was the charachter development, you see the transformation in reasoning and personality as the story neared the end.

Also If you're a fan of Charlize as well as action films, I Highly recommend you see Mad Max Fury Road which i enjoyed it's story and world building, and was amazed by how it executed the action scenes