
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 young girl beaten after watching her grandmother killed, identifies the wrong person; years later she tries to change her statement.

A canine behaviorist uses the family dogs, who are the only witnesses, to find the murderer of their owner.

A murder in Australia baffles police, until they find a device intended to save lives is the only witness to the man's death.

Investigators see through a killer trying to cover his tracks by staging the crime scene to learn what really happened.