Question

Which of the following is the BEST example of the exchange principle?

(1 point)

a victim’s blood found on a suspect’s shoe


contradictory testimony provided by witnesses


finding the murder weapon near a crime scene


breaking a suspect’s alibi through the use of cell phone tracking

Answer 1

Answer: a victim’s blood found on a suspect’s shoe.

Explanation: This illustrates Locard’s exchange principle — physical contact causes mutual transfer of material (blood on the shoe).