At the end of November, 18-year-old John Threlfall was murdered at his home in Lancashire. Police want to trace the strangers asking directions to the house on the day he died. Hertfordshire police want to find the man who raped a young woman, then forced her to drive him to Epping Forest, where she crashed her car to escape. Plus the hunt for raiders who fired indiscriminately in the centre of London after robbing a security van.