
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.
In a wealthy area of Philadelphia, police are called to the scene of what seems like a regular accidental drowning; the investigation begins to focus on one person who has many reasons to want the victim dead.
A 19-year-old girl is found dead in her car in what appears to be a suicide; police discover that the victim was involved in a love quadrangle, giving several people motive to kill.
Police suspect a gay college student's slaying is a hate crime until forensic evidence points the case in another direction.
Fifteen years after a man disappears, using a metal detector, police find evidence which proves what had happened.