Shadow Friend, the (A)

If it had happened to you, you would have run away too. Twenty-five years ago, Paul's friend Charlie Crabtree brutally killed their classmate - and then vanished without a trace. Paul's never forgiven himself for his part in what happened. He's never gone back home. Until his elderly mother has a fall. It's finally time to stop running. It's not long before things start to go wrong. His mother claims there's someone in the house. Paul realises someone is following him. And, in a town many miles away, a copycat killer has struck. Which makes him wonder - what really happened to Charlie the day of the murder? And can anyone stop it happening again?