
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.
Two people witness a truck driving over an unconscious man and flee into a nearby bar, but when the police turn up, the truck, the man and the witnesses are gone.
Insect evidence helps to solve the mystery of a woman found dead near a river bank.
A trash collector finds a severed human leg in a trash bin, but police cannot use conventional methods of victim identification; investigators turn to toxicology and DNA tests to find the murder-mutilator.
A coroner finds telltale clues on the badly burned body of a murder victim, sending police in pursuit of a couple of killers.