Wizards and the Sociopath - A PotterLock Fanfic

John and Sherlock meet on the Hogwarts Express and become good friends. They are then split up by houses and John makes Friends with The Marauders. They don't like Sherlock. Meanwhile, students are dying and Sherlock is determined to solve the case. BBC sherlock cross over with Harry Potter. TeenLock. I do not own Sherlock or Harry Potter! IT'S COMPLETED!! There will be a book 2!