An insight into some of Northern Ireland's most high profile murder cases using dramatic reconstruction, expert witness, archive footage and taking a fascinating look at the science, including forensics and pathology. Most importantly, it hears from the victims' relatives about the human cost. In Cold Blood, tells the human stories behind the headlines by building up and reconstructing a picture of the victim's last movements and offers an interpretation of how the actual events took place. The programme has unique access to the PSNI investigation, as well as the forensic experts involved.