Answer :
The key principle underlying crime scene examination is an idea that has become known as Locard's Exchange Principle. It expresses that at whatever point somebody enters or leaves a climate, something physical is added to and taken out of the scene.
The rationale behind this standard permits examiners to connect suspects to casualties, to actual articles, and to scenes. Any proof that can connect an individual to the scene is alluded to as cooperative proof. This might incorporate things like fingerprints, blood, organic liquids, weapons, hair, strands, and such. This kind of proof responds to the inquiry "Who did this?" While cooperative proof connects individuals to the spot of the wrongdoing, reconstructive proof permits examiners to acquire a comprehension of the activities that occurred at the scene. A messed up window, a blood splash design, slug ways, and shoe prints can all uncover what really occurred.
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