Question

Which principle of Forensic Science states that "Every contact leaves a trace"?

• A. Principle of Individuality
• B. Locard's Exchange Principle
• C. Principle of Comparison
• D. Principle of Probability

Hint:

{Locard's Exchange Principle} states that \textit{"Every contact leaves a trace."} It means that whenever two objects come into contact, there will always be a transfer of physical evidence.

Answer 1

The Correct Option is B

Concept: Forensic Science applies scientific principles and techniques to investigate crimes and analyze evidence. Various principles guide forensic investigations and help in understanding how evidence is transferred and identified. Some important principles of forensic science include:

• Principle of Individuality: Every object or person is unique.
• Locard's Exchange Principle: Every contact results in a transfer of material.
• Principle of Comparison: Only similar objects can be compared.
• Principle of Probability: Evidence can be evaluated based on probability.

Step 1: Understanding the statement "Every contact leaves a trace."}} This statement means that whenever two objects or persons come into contact, there is always a transfer of material between them. For example:

• Hair fibers may transfer between individuals.
• Dust, soil, or fingerprints may remain at the crime scene.
• Clothing fibers may transfer during physical contact.

Step 2: Identifying the principle associated with this idea.
This concept was proposed by the French forensic scientist Edmond Locard. It is known as Locard's Exchange Principle, which states that any contact between two objects will result in the exchange of traces. Thus, the correct answer is: \[ \boxed{\text{Locard's Exchange Principle}} \]