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He was a Spanish chemist who specialized in toxins. He created new techniques to test for arsenic. Arsenic was hard to detect before he greatly improved the accuracy of these tests. His methods were used in a famous poisoning case in France. -
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He was a French police officer and anthropologist who brought an important identification technique to law enforcement. His approach used biometrics, or precise anatomical measurements - to identify criminals, and this was the first scientific system used by police for this purpose. -
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He was an Austrian magistrate and criminologist. He made significant contributions to the world of scientific criminology by introducing standard terminology, which he included in a detailed handbook used by magistrates. -
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He was an Austrian physician, biologist and immunologist who was awarded the Nobel Prize for his 1901 work in blood typing, which was used for safer blood transfusions and for criminal investigations. -
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He was a French police officer and criminologist who established the first police crime lab. He developed the basic principles of forensic science. His exchange principle stated that whenever two objects came in contract, some trace of each was left on the other, even if microscopic. -
