What are biological materials in crime scene processing?

Biological materials in crime scene processing refer specifically to items or substances that originate from living organisms, which can include both humans and animals. This definition encompasses a wide range of biological evidence such as blood, saliva, hair, skin cells, and other bodily fluids. These materials are crucial in forensic investigations because they can provide valuable DNA evidence, help establish connections between suspects and victims, and support various criminal justice processes.

The focus on human or animal origin is essential because it distinguishes biological materials from non-biological or artificial substances that may also be present at a crime scene. This classification is vital in forensic science as it directly links biological evidence to potential sources, further assisting law enforcement in solving crimes. Understanding the nature of biological materials and their significance in crime scene processing is fundamental for effective evidence collection and analysis in criminal investigations.