No two fingerprints are the same. Fingerprints can be taken even from surfaces which are not smooth (e.g. clothing or paper towel). Even if fingerprints are months or years old, new technology allows scientists to recover fingerprints from objects. Techniques using charged particles or particles that glow under certain conditions are applied to test areas. This allows for testing of larger areas and faster processing of fingerprints at the crime scene.
Canadian Heritage Information Network

© CHIN. All Rights Reserved.

Teachers' Centre Home Page | Find Learning Resources & Lesson Plans