In 2013, when Detective Superintendent Martin Brunning was called to the scene of a man's body in a black sequined dress dumped in a ditch, he was in a race against time to catch one of the UK's most notorious female serial killers.

Detective Superintendent Mark Birch had to escalate a missing person case to a murder investigation just before Christmas in 2006. As the investigation unfolded, a picture emerged of a brutal crime committed by brothers on their brother.

In the ten days before Christmas 2006, Detective Chief Superintendent Stewart Gull was faced with every detective's worst nightmare, as the bodies of five young murdered women are found in the Suffolk countryside

In 2007, when Detective Chief Inspector Howard Groves took a phone call from the Dutch Cold Case Team in Rotterdam, he began one of the GB’s most complex murder investigations—investigating two women’s bodies found in canals in GB and Holland eleven years apart. Meanwhile, the suspect was already...