There are some crimes that leave a permanent mark on a place - and this episode tells the story of Dartford, and the shocking murder of Claire Tiltman. When her body was found with multiple stab wounds beside a busy main road, her friends and family were devastated. A murder enquiry was launched, but initially drew a blank. They suspected the killer was local, and Claire’s family feared the killer was someone they knew. But for years he remained in the shadows. This episode explores how a serial attacker was eventually snared by police, but it would be more than 20 years later that the details of Claire’s killer would finally be revealed. With contributions from senior police officers, Claire’s friends, and witnesses from the time, this episode is a revealing exploration into the most shocking murder ever to strike the community of Dartford.