
Eagle-eyed technical experts prove there is no such thing as a perfect crime as they assemble the pieces every criminal leaves behind. Dramatic crime re-creations and, sometimes, part of the investigations are a staple of the series. Some of the re-creations include alternate versions of the crimes, which are disproved by science. The show's episodes follow each case from the initial investigation until it reaches its legal resolution.
A canine behaviorist uses the family dogs, who are the only witnesses, to find the murderer of their owner.
An attack on a couple's home leaves the husband dead, the wife gravely injured and their son as a prime suspect; hundreds of miles away, a DNA sample may lead to the killer.
Detectives think they've solved a murder when they find the weapon and victim's blood in a man's flat, but the evidence may have been planted.
When a single mother is murdered, her brother vows to find the person responsible for the death of his sister, even if it takes more than 30 years.