With a morphine overdose, Dr Harold Shipman killed over 250 of his patients. He is considered to be one of the most notorious serial killers in Britain.

Recalling the capture and conviction of the man responsible for the deaths of five of his children and one of their half-brothers.

Examining the murder of Sarah Payne, an eight-year-old girl who was killed by Roy Whiting in 2000, and the mistakes he made that led to him being arrested and locked up for life.

An investigation into the case of doorman and car clamper Levi Bellfield, who committed three murders, including that of schoolgirl Milly Dowler in 2002. He could have gone on to claim even more victims had he not made a string of mistakes.