What is the name of the principle that evidence can be transferred through contact?

• A. Hue and Cry
• B. Locard's Exchange Principle
• C. Patronage
• D. Anthropometry

Answer: (B)

At the heart of this concept is the idea that contact between people and objects results in material being exchanged. Locard's Exchange Principle states that whenever two objects come into contact, there is a mutual transfer of physical material, so the perpetrator will leave something at the scene and also take something away with them. This is the basis for why investigators search for trace evidence like fibers, hair, skin cells, or residues, because these tiny exchanges can link a person to a crime scene or object.

The other terms don’t describe this idea: Hue and Cry refers to a public call for help, Patronage is about sponsorship or political support, and Anthropometry is a historical method of measuring the human body for identification. Locard's Exchange Principle is the concept that explains evidence transfer through contact.