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Gustav Kirchhoff and Robert Bunsen developed the science of spectroscopy.
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Crime scene photography developed
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Alphonse Bertillon developed a system to identify people using particular body measurements
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Edward Henry developed first classification system for fingerprint identification
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Karl Landsteiner identified human blood groups
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Edmond Locard formulated his famous principle, “Every contact leaves a trace.”
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Francis Aston developed the mass spectrometer.
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James Watson and Francis Crick discover the DNA double helix
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AFIS developed by FBI, fully automated in 1996
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Jeffreys developed and used first DNA tests to be applied to a criminal case