Following a three-part series broadcast last year, Channel 4 have announced that In The Footsteps Of Killers will return for a six-part run later this year.
In the true crime series, Emilia Fox and Professor David Wilson, Britain's leading criminologist, investigate famous unsolved murder cases.
Together they use the latest forensic science and criminological research to shed new light on these troubling crimes and look for new leads that the original investigations may have missed.
The first episode saw the time investigate the case of thirteen-year-old David Spencer and eleven-year-old Patrick Warren who went missing in Birmingham on Boxing Day in 1996.
Previous episodes are available on All4.