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The Chinese were the first to attempt to find the difference between natural death and death with criminal intent
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Karl Scheele found that you can transform arsenic oxide and arsenic acid and make arsine when mixed with zinc. This lead to the discovery of arsenic poisoning
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In the 1800s people started studying fingerprints but have not yet used them to identify people.
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Professor Mathieu Orfila is the first to use a microscope to look at blood stains
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Henry Goddard noticed a flaw in a bullet and traced it back to the original mold
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A German Scientist realizes that hydrogen peroxide foams when there is the presence of blood
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A German realizes that you can use hair as a way to identify someone by the unique characteristics
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They finally realize that you can use fingerprints to identify a suspect by using their fingerprint
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Benzidine is a chemical compound universally used to find blood
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It was built in Los Angeles, CA
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Because of the war, we have techniques like lifting fingerprints using tape, voiceprint identification and the discovery of the unique structure of DNA
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By mid-1960s we perfected Identification of firearms and Breathalyzer tests
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This is the federal rule that says evidence must be relevant to the crime
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The FBI starts using computerized fingerprint identification cards
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The first DNA database was created in England
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We now have many different ways to identify not only the suspect and the victim but the murder weapon of choice. We know the cause of death, and when they died.