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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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Julius Caesar is assassinated. Following this event, a physician performed an autopsy, and determined that of the 23 wounds found on the body, only one was fatal.
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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.. A book created by Hsi DuanYu, published by the Chinese. This book was the first recorded application of medical knowledge to the solution of crime.
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German chemist Valentin Ross developed a method of detecting arsenic in a victim's stomach, thus advancing the investigation of poison deaths.
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By the mid-1800s investigators started using bullet comparison to solve shooting murders.
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Investigators started using photo identification
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Juan Vucetich and a Argentinean police officer, was the first to use fingerprint ID. They created the system which they later termed dactyloscopy.
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Human blood grouping, ABO, discovered by Karl Landsteiner and adapted for use on bloodstains by Dieter Max Richter.
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Prototype polygraph, which was invented by John Larson in 1921, developed for use in police stations.
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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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Police now can use hair, blood, or any other forms of DNA to tell who was at the crime scene.
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Britain's Forensic Science Service develops online footwear coding and detection system. This helps police to identify footwear marks quickly.
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Michigan state university develops software that automatically matches hand-drawn facial sketches to mug shots stored in databases.
