Investigating crime is an integral part of policing and officers are trained to find clues and evidence at crime scenes.

Crimes can range from burglaries through to attacks on individuals. This video describes a difficult case and contains some graphic content.

What is Locard’s Exchange Principle?

Edmond Locard’s Exchange Principle states that with contact between two items, there will be an exchange of microscopic material. This certainly includes fibers, but extends to other microscopic materials such as hair, pollen, paint, and soil.

This means that is impossible for an offender not to leave some evidence of them being at a crime scene.

Now that you have seen some of the basics, let’s see if you can take part in a more complex investigation. This scenario encourages you to seek the right evidence to secure a conviction.