This drama actually keeps his promise, there were no subplots or whatever writers always use to drag the drama. And knowing that the drama was based on a true story it was really well executed, all the cast did a great job at portraying their characters.

It's true that it was slow and somehow predictable, but since this is based on a true story, i kind of expected it. Because in real life it is not so easy to solve a crime case and to be a profiler at the time was not something common.

So i will give this drama an 8.5/10, and i totally recommend it, though it is not the kind of drama i would rewatch lol.