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First pathology reports published
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First recorded instance of physical matching of evidence leading to a murder conviction (John Toms, England). Evidence was a torn edge of newspaper in a pistol that matched newspaper in his pocket.
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German chemist Valentin Ross developed a method of detecting arsenic in a victim's stomach, thus advancing the investigation of poison deaths.
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Clothing and shoes of a farm laborer were examined and found to match evidence of a nearby murder scene, where a young woman was found drowned in a shallow pool.
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James Marsh, an English chemist, uses chemical processes to determine arsenic as the cause of death in a murder trial.
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Human blood grouping, ABO, discovered by Karl Landsteiner and adapted for use on bloodstains by Dieter Max Richter.
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FBI establishes its own crime laboratory, now one of the foremost crime labs in the world. This same year, a chair of legal medicine at Harvard was established
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FBI established the National Crime Information Center, a computerized national filing system on wanted people, stolen vehicles, weapons, etc
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Technology speeds up DNA profiling time, from 6-8 weeks to between 1-2 days.
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A way for scientists to visualize fingerprints even after the print has been removed is developed, relating to how fingerprints can corrode metal surfaces.
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Michigan state university develops software that automatically matches hand-drawn facial sketches to mug shots stored in databases.