In murder-mystery TV shows, detectives look for clues to find the killer. Part of that involves getting into the murderer's mind-set. What factors make it easier for one person to take the life of another?
Terrorists work very hard to remain undetected. After all, if we knew where they were, we could stop them from attacking. But they usually work in small groups, or even alone. How do law enforcement officials track them down?
When an anthrax attack just after Sept. 11 killed five people and infected 18 more, U.S. residents were sent into a bioterrorism panic. Bioterrorism has actually been around for many centuries, but we keep finding new ways to combat it.
From the Zodiac killer to Jack the Ripper, many disturbed criminals have never been caught. These crimes became well-known in history because the crimes remain unsolved and the case technically remains open. Read about 9 of history's coldest cases.
Such famous artworks as 'Mona Lisa' and 'The Scream' have been stolen and returned; some have never been found. Art burglars either keep the artwork for themselves, or try to ransom it back to the original owner. Learn about 7 notorious art thefts.
It seems impossible to lose something so valuable, but it has been done -- more than once. See our list of the world's greatest missing treasures, including The Amber Room and Pharaohs' Missing Treasure.
Today, some police forces are using virtual reality technology to capture and recreate crime scenes digitally. They've discovered that, if used properly, virtual environments help the investigation process from its earliest stages all the way to a verdict.