Nick Ross and Jill Dando look at the shocking case of schoolgirl Katerina Koneva, found dead in her West London home in May. The attacker was chased by her father but his trail goes cold at Hammersmith station. Close circuit television footage of the chase has already been shown but police hope this reconstruction may prompt more reports of sightings.
There is also a reconstruction of an armed robbery at a DIY store in Leicester. After bursting into the manager's office, a man rampaged through the store spraying staff and customers with CS gas. He made his getaway in a waiting car.
BBC One