History of the CSI By tkrodeo May 17, 1800 CSI History The CSI History goes back into the early 1800's Period: May 17, 1800 to May 18, 1800 1800’s Different Blood groups were discovered May 17, 1830 1830- Bullet comparision Period: Oct 14, 1830 to Sep 10, 2017 1830- Different DNA strands discovered. Period: May 17, 1840 to May 18, 2017 1840 Using body temperature to determine how long a body has been dead. Period: May 17, 1858 to May 18, 1858 1858- Improved Fingerprinting techniques. Period: May 17, 1880 to May 18, 1880 1880- Fingerprinting system developed Period: May 17, 1986 to May 18, 1986 1986- DNA testing