The MC has a nice character (the writer may have exaggerated a bit trying to make him look perfect, Ideal police officer liked by both his superiors, coworkers and victims, but at least he didn't end up looking like an arrogant dumb*ss who think themselves the greatest geniuses in the world but are actually a peace of tr*sh without the plot armor like many others)

The plot is interesting, sometimes boring since it's a novel with a normal world sittings this inevitable, personally I'd have loved if the writer were to gradually integrate some Si-fic elements into the novel, maybe some supernatural criminals since he already added some to the MC, of course this will make it more complicated and requires more work and skills.

the cons:

-the usual racism stuff

-the criminals are weak and they all give up and confess once caught and faced with the evidence, they all do the same which is totally illogical as in real life most criminal don't confess or give up easily, they always look for a way out or leave thing to the chance.