
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.

A speck of bicycle paint and a speck of nickel left over from a collision with a twice-convicted child molester's car provide critical clues in the murder of a 9-year-old.

At first glance it appears a young woman suffocated, but further investigation shows the scene was staged.

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.

A killer is careless when a home is destroyed by fire and a young boy is missing.