
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.

Blood spatter analysis and an investigation lead police to the truth when a pregnant woman is found dead in her home.

In 1976, 182 war veterans in Philadelphia become hospitalized with pneumonia-like symptoms and 29 die; the disease resurfaces every few years.

A young woman goes missing without leaving many clues, but the advanced technology on offer makes it possible for cat hairs and insects to help build an image of the abductor.

Investigators solve the 1988 murder of a drifter in Southern California by examining a species of fly found near the body.