If one is to look at this through the eyes of a teenager, the reasoning for not going pressing the issue with the police makes sense. If one looks at it through the eyes of an adult...what the hell, it was fun. It's a good, basic look at the serial killer genre, which I like (though not nearly as much as the spy genre; and definitely not as much as my step-mother likes the serial killer genre).
I thought it was well-written for the YA crowd. McNamee didn't stray from the story to try to make the characters reflect pop culture. Something I thought was interesting was how the author kept going drawing back to the potential killer's torture of mice in the first chapter. For example, he described something as mouse-sized late in the book. I don't think that was by accident. He also made some references to the serial killer genre, but I already returned the book to the library, so I cannot look them up as examples, but a few were very subtle.