This is a ‘based on a true story’ movie that plays out more like a classic Noir title than a true crime detective docudrama. The manhunt portions don’t lag terribly because they’re intercut between hunter and hunted. The short runtime also helps keep the story focused, not bogged down by manufactured drama.
Closest comparison: It’s like No Country For Old Men by way of Dark Passage.
Setting: Crime
Plot: Manhunt
Tone: Noir