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What is A case of murder with gunshot is repoed. A metal bullet is recovered from the body. Primary and Secondary markings on a metal bullet can be used for and explain in detail?
A i.e. Identification of weapon - Primary markings (class characteristics) and secondary markings (metallic fouling, individual or accidental characteristics) on a bullet can be used for identification of weaponQ. - Bullet is picked up with handsQ. Gunshot residue on hands can be detected by Dermal nitrate testQ.