Cold Blood promises viewers a heartstopping journey through ten extraordinary murder investigations. They are mysterious and leave detectives baffled, outwitted and deceived until a final, dramatic forensics breakthrough cracks the case. Each film tells the chronological story of how the detectives solve a difficult murder. Every whodunit mystery begins with the arresting scene of the murder just as the police would have found it. Clues are collected, forensics detailed, witnesses interviewed and testimonies taken. With each new piece of information, various theories begin to emerge about who did it, how they did it and why.