science. It often involves submission of some tangible object that was directly involved in the situation or incident (document, passport, weapon, narcotics, drugs, clothing, tax return, blood, hair, etc). Demonstrative evidence serves as an audio-visual aid and is designed to assist the trier of fact in understanding the witness’ testimony. It can include maps, models, x-rays, diagrams, models, computer graphics, statistics, etc. Authentication Authentication requires the party offering contested…
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