Final answer:
Locard's exchange principle is related to crime scene investigation and is used to link suspects to crime scenes through the transfer of physical evidence.
Step-by-step explanation:
Locard's exchange principle, often referred to as Locard's law, is related to crime scene investigation. This principle is a cornerstone of forensic science and posits that whenever two objects come into contact with each other, there is a transfer of material from one to the other. It's commonly used to link a suspect to a crime scene through traces of physical evidence, such as fibers, hair, or soil, which supports the investigative process of collecting and analyzing forensic evidence.