Murder On The Hogwarts Express

Harry Potter, Head Auror, is finishing up after a long day at work, when his boss - and his best friend - Hermione barges into his office, looking completely shocked. There has been a death on the Hogwarts Express. To a parent who only put his three children to the said train that morning, it is undoubtedly the most terrifying news. This is a story about solving a crime.