Once a mistake, twice a mistake… The case of the broken 'beetle'

Steven Nobel is a very shy schoolboy. He often finds himself in awkward situations and speaks at inopportune times. Yet he tries to control his life, which is why he keeps a strict record of all his mistakes. And not just his... This is why Steven notices a lot of interesting things. Why do different people drive the same car? Why did the police blow up his classmate's backpack? Who broke the school wall? These are all mistakes that someone made. And they are also crimes, and Steven Nobel will surely solve them!