Forensic Science: Introduction - Mrs. Klatt's Science Page

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Forensic Science: Introduction Forensic Science - Application of the scientific method and techniques to law and criminal justice. Encompasses many fields: Chemistry, Physics, Biology, Earth Sciences, Mathematics, Psychology, Anthropology, etc

History Began formally in late 1700’s. Real application of the scientific method and techniques in 1900’s. Important Names: Sung T’zu Mathieu Orfila (toxicology) Aphonse Bertillion (anthropometry) Francis Galton (Fingerprinting) Leone Lattes (blood grouping) Calvin Goddard (Ballistics) Alexndre Lacassagne (anthropology) Edmond Locard (scientific criminal investigation) Crime Writers: A.C. Doyle, A.Christie

Aphonse Bertillion Bertillon Measurements

Edmond Locard 1877-1966 Application of scientific techniques to criminal investigations. Set up first real forensics lab.

Locard’s Exchange Principle The most basic concept of Forensic Science: When a criminal in contact with an object or person at a crime scene, a cross transfer of evidence occurs Examples: dust, biological samples, fingerprints, chemical residues, etc. Links a person to the crime scene

Arthur Conan Doyle Creator of Sherlock Holmes - Based upon real life Prof. Joe Bell (U. Edinburgh). Preceded and foretold many chemical analyses for forensic investigations

Agatha Christie Creator of Hercule Poirot and Miss. Jane Marple. Most read of crime/forensics writers

Scientific Method Form and test hypothesis Patterns and Trends Theory Observations and Experiments

Multidisciplinary Approach Natural Science: Biology Physical Science Chem, Physics Medicine Forensic Science Engineering Social Science Psych, Anthr. Law Enforcement

Example of the Multidisciplinay Approach and Needs of Forensic Science – Salem Witch Trials “In February of the exceptionally cold winter of 1692, young Betty Parris became strangely ill. She dashed about, dove under furniture, contorted in pain, and complained of fever. Cotton Mather had recently published a popular book, "Memorable Providences," describing the suspected witchcraft of an Irish washerwoman in Boston, and Betty's behavior mirrored that of the afflicted person described in Mather's widely read and discussed book .”

1690 Medicine

Salem Witch Trials From June through September of 1692, twenty men and women, all having been convicted of witchcraft, were executed. Hundreds of others faced accusations of witchcraft. Dozens languished in jail for months without trials. Then, almost as soon as it had begun, the hysteria that swept through Puritan Massachusetts ended.

“Examination of a Witch”

Ergotism (St. Anthony’s Fire) Ergot - A toxic fungus found as a parasite on grains of rye. Gangrenous ergotism (gang-green) - nausea, pains in the limbs, bodily extremities turn black, dry and become mummified Hallucinogenic ergotism - vivid hallucinations nervousness, physical and mental excitement, insomnia and disorientation, strange dances with wild, jerky movements accompanied by hopping, leaping, screaming, and dancing compulsively until exhaustion lead them to collapse unconscious.

Ergotism Ergotamine tartrate Lysergic acid diethylamide

Localization Weather Timing Symptoms (including recovery) Accounts for full series of events Others

Forensic Science: Introduction Forensic Science: Introduction Forensic Science - Application of the scientific method and techniques to law and criminal justice. Encompasses many fields: Chemistry, Physics, Biology, Earth Sciences, Mathematics, Psychology, Anthropology, etc History Began formally in late 1700's.

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