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Forensic science is the application of scientific principles to matters involving the law. It is a large umbrella science consisting of many sub-disciplines including serology, forensic DNA analysis, toxicology, document examination, hair and fiber analysis, soil analysis, colour and paint analysis, examination of writing and painting inks, analysis of drugs having criminal usage (like tranquilizers, poisons and date-rape drugs), alcohol analysis, arson investigation, firearms and tool marks, explosive analysis, blood spatter pattern analysis, digital evidence, impression evidence, forensic pathology, forensic anthropology, forensic odontology, forensic environmental chemistry, spectrometric analysis, and others. All of these techniques are intrinsically dependent on chemistry of materials and processes. In essence, the role of forensic chemistry in criminal investigations is vast and ranges from techniques used to collect and preserve evidence, to complex chemical procedures used to identify elements and compounds.
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