Harrowing and compelling as this story is, and I did (mostly) enjoy the film, I was really disappointed that there wasn't more to it. I expected a twist, or a revelation, or some kind of climax. Whilst real life doesn't always come with neat red herrings and gut punch reveals, that is what the best crime thrillers deliver. I wonder if this might have been a better "based on a true story" rather than a direct biographical retelling.