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Fingerprints are used on clay tablets used as signatures.
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Erasistratus (Ancient Greek physician) proposed that people's heart rate increases when telling lies.
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In ancient times, people murdered using sickles. A sickle is a knife like sharp curved metal that many villagers had. So to figure out what the murder weapon was, they asked everyone to bring their sickles into town and lay them out in the sun. The flies would then circle around the one with the smell of blood.
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Father and son Hans and Zacharias Janssen are believed to create first microscope.
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John Toms is convicted of murder because torn piece of paper is found in his pocket which matches pistol.
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Henry Goddard compared bullets based on flaws in the bullet to catch murderer.
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Detectives started photographing criminals to be identified and crime scenes.
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Henry Faulds wrote a paper saying that fingerprints could be used to find the suspect at the crime scene.
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Leonard Keeler and John Larson designed the 1st portable polygraph
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Antinomy and lead is left on the hands of people who fired a firearm.
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