/lit/ - Literature

I'm writing a short novel about a man who really hates someone, and then at a point he completely loses his patience and murders him. He hides the body in a forest and goes back to town. A few days after the police starts investigating. When the MC notices they're getting too close to finding out that he did it, he murders one of the cops. An old woman sees it and he murders her too

Basically he goes on a murder rampage because he doesn't want to be found. At the beggining of the novel, he'll love the feeling of killing the guy he hated, but only for a few seconds. Once he realizes what he just did, he gets scared and feels immensely guilty. But as the plot advances, he starts getting more and more pleasure out of killing people

Is it a good idea?