#403 Fingerprints

Fingerprints, referred to as 'fingermarks' in forensics, are formed when residue from the ridged skin of the fingers or palms is [1] onto a surface, leaving behind an impression. Fingermarks are often made of sweat and colorless [2] materials such as soap, moisturizer and grease. These fingermarks are described as 'latent' as they are generally invisible to the naked eye, which means that [3] them at a crime scene can be challenging.