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Swiss chemist Friedrich Miescher first identified DNA in 1860's but in 1953, James Watson and Francis Crick discovered that DNA is a 3D double Helix
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In 1986, police in the UK asked Dr. Alec J. Jeffreys of University of Leicester to use fingerprinting DNA to convict Colin Pitchfork
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In1990, researchers took on the task of mapping out human DNA which they acheived after 13 years
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Joseph James Deangelo was charged with 13 counts of murder in 2018 by linking him to cold cases dating back to 1974. DNA was obtained through victims relatives and discarded razors and napkins used by Joseph
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Nancy was found murdered in her apartment in 1970 and it was a cold case until in August 2022 when police found the killed through DNA evidence obtained similar to the Golden State Killer