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DeForrest
Pioneers the first systematic use of fingerprints in the United States -
R. Fischer
R. Fischer furrows the red part of human lips which formed a basis for cheiloscopy -
Popp
Georg Popp uses geological evidence in a case for the first time -
Roosevelt establishes the FBI
Roosevelt establishes the FBI -
JJ Thomson
JJ Thomson builds the first mass spectrometer known as the hyperbola spectrograph -
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Structure of DNA discovered
Watson and Crick made model of DNA -
Fiddes and Patten
Fiddes and Patten write a paper on how someone can determine time from death based on cooling. -
R.R. Race
R.R. Race first describes the Kell blood group system
