
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.

When a young boy has serious respiratory problems and his father shows signs of early Alzheimer's disease, a chance encounter with a stranger kicks off an investigation into the cause.

A husband confesses to his wife's murder, only to be found not guilty a year later when a phone tip and forensic evidence point to another.

Investigating the worst arson spree in U.S. history -- a rash of more than 75 fires near Seattle.

In Lorton, Va., police attempt to determine who abducted 5-year-old Melissa Brannen after she disappeared from a Christmas party, but cannot be certain until they match hair from a rabbit-fur jacket Brannen wore that day.