Question

What are the three main sources of typically finding physical evidence according to Forensic Sciences?

• A. The crime scene; the witness; and the investigating agency
• B. Finger prints; body fluids; and weapons and tools
• C. The body materials; chemical substances; and botanical materials
• D. The crime scene; the culprit; and the victim

Hint:

Remember the "Forensic Triangle" or "Evidence Triangle" which links the Suspect, Victim, and Crime Scene. Physical evidence is the material that connects these three points.

Answer 1

The Correct Option is D

Step 1: Definition:
Physical evidence in forensic science is any material object linking a crime to its victim or perpetrator. The question seeks the primary sources of this evidence.
Step 2: Analysis:
Let's examine the options:

(A) The crime scene; the witness; and the investigating agency: Witnesses offer testimony, not physical evidence. Investigating agencies gather evidence, not originate it.
(B) Finger prints; body fluids; and weapons and tools: These are types of physical evidence, not its sources.
(C) The body materials; chemical substances; and botanical materials: These are also categories or types of physical evidence, not the primary sources.
(D) The crime scene; the culprit; and the victim: This is correct. Based on Locard's Exchange Principle, evidence transfers during a crime. Therefore, evidence is found at:

The Crime Scene: The location of the crime.
The Culprit/Suspect: The perpetrator may carry traces.
The Victim: The victim may have traces.
Step 3: Conclusion:
The three main sources of physical evidence are the crime scene, the victim, and the suspect/culprit.