
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.

Police use DNA profiles of seed pods from a truck to catch a killer.

An abandoned, still-running car leads investigators to a body with unusual marks and a DNA trail that lead to the killer.

Investigators use blood evidence to convict a man of murdering his wife.

Police find fragments of deleted computer files leading them to suspect a woman's suicide is really murder.