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The Chinese start finger printing for the first time by using clay, even though they had no way of classifying them.
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A physician in Greece creates the first lie detector test, he would record if their heartbeat elevated which showed him they were lying.
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The Romans become the first to do an autopsy, which they did on Julius Caesar's body and determined that out of the 23 stab wounds he received only one was fatal.
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Roman authorities determined that bloody palm prints at murder scenes usually mean that whoever did the crime was trying to frame someone else.
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The Chinese start recording the medical knowledge they learn to help them determine cause of death. Such strangulation being recognized over drowning.
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Over the next 500 years the main thing to be developed is recognizing poisons. Which really developed CSI, and it was first really used in 1813.
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By the mid-1800s investigators started using bullet comparison to solve shooting murders.
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This was able to be used anywhere not just at the station which really helped advance solving crimes.
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Police were now able to tell where guns were fired and even who fired them if there was leftover residue on their clothing or hands.
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DNA is accumulated over long periods of time in hope of one day being able to use it.
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Police now can use hair, blood, or any other forms of DNA to really tell who was at the crime scene but only if the person is in their data base but this is what sets up CSI that we know today.
