I was looking for a fast paced, no nonsense, no romance police procedural to listen to on a very long drive and this was P E R F E C T. Loved the methodical police work and the slow piecing of the evidence. Perfect balance of police procedure and very little character stuff. I did have some issues with the investigation though:

Feels like for all of their thoroughness, there were a bunch of things the detectives never really looked into, or not early enough. As soon as they realized they were dealing with a pedo ring, they should have reached out to vice and seen if there was an investigation into any local pedo rings already - could have pointed them to the identities of the next victims. Why didn't they look into who the kids are? Check out missing kids' posters etc. Not once did they wonder whether these kids are being held somewhere, trafficked, etc. What if they had to find them to free them? This wasn't brought up at all which felt like a major plot hole.