"After suspecting that their police officer neighbor is a serial killer, a group of teenage friends spend their summer spying on him and gathering evidence, but as they get closer to discovering the truth, things get dangerous."

Initially thought the movie was along the lines of the movie, "Stand by Me", but the ending is where it happens. Pre internet, pre smartphones. The boys get the information they seek from..................books.
I'd give it 7.5/10.