Forensic Science: A Very Short Introduction (Very Short by Jim Fraser

By Jim Fraser

As a result of its connections to violent crime and creative detective paintings, forensic technological know-how is a topic of never-ending fascination to most of the people. A felony case can frequently hinge on a bit of facts resembling a hair, a blood hint, just a little saliva on a cigarette butt, or the telltale mark of a tire tread. excessive profile circumstances have stoked this curiosity lately and a few of the most well-liked indicates on television--such as CSI: Crime Scene research and its raft of spin-offs--attest to the long-lasting acclaim for forensic technology as a sort of grisly leisure. This Very brief advent seems to be on the nature of forensic technological know-how, analyzing what forensic technology is, the way it is utilized in the research of crime, how crime scenes are controlled, how forensic scientists paintings, different innovations used to recuperate proof, and the diversity of equipment to be had for research. It additionally considers how forensic technology serves the legal justice procedure and the demanding situations of speaking advanced clinical proof in a courtroom of law.

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This no-nonsense advisor is an admirable replacement to the CSI technology fiction juggernaught. Jim Fraser discusses specialist facts, DNA, fingerprints and affirmation bias, declaring the Birmingham 6 and Sir Roy Meadow, notwithstanding now not Shirley McKie's shameful persecution at the foundation of supposedly infallible fingerprint proof. attention-grabbing. William Darragh, Fortean instances juggernaut...Fascinating.

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Extra resources for Forensic Science: A Very Short Introduction (Very Short Introductions)

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Fire debris samples Nylon bags or sealed glass/metal container, with foil lid if a liquid sample Volatile liquids will pass through polythene. Drugs Polythene bags Bags usually bear a unique serial number as a reference for each individual sample. Although many aspects of scene management are procedural, it is essential at all times to consider the investigative implications of actions and decisions. The rational but contingent selection of one or more investigative opportunities may preclude others that are subsequently found to be of value.

Examination offirearmsand the identification of FDR is usually done in separate sections due to the potential contamination issues. (Continued} Table 6. Continued Section/Evidence type Examinations Comments Fingerprints Comparison, identification, and enhancement of finger marks. In most cases, the laboratory work is confined to enhancement of marks, with comparison being carried out in a separate fingerprint department. Many laboratories do not have a fingerprint section but most will have some capacity to enhance or visualize marks for examination by fingerprint experts.

The combination of the visual appearance of the bloodstain followed by a satisfactory KM test is generally regarded as sufficient to establish that a stain is blood. Stains that give a KM positive test but do not resemble blood may be mixtures of blood with another body fluid, such as saliva due to bleeding from the mouth. Alternatively, the stain may not contain blood, as a range of other biological materials and some chemical oxidants can give false positive reactions, although these are rare.

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