when were fingerprints first used in crime detection
Fingerprint Although ancient peoples probably did not realize that fingerprints could uniquely identify individuals,[61] references from the age of the Babylonian king Hammurabi (reigned 1792-1750 BCE) indicate that law officials would take the fingerprints of people who had been arrested.[62] During China's Qin Dynasty, records have shown that officials took hand prints, foot prints as well as finger prints as evidence from a crime scene.[63] In China, around 300 CE, handprints were used as evidence in a trial for theft. By 650, the Chinese historian Kia Kung-Yen remarked that fingerprints could be used as a means of authentication.[64] In his Jami al-Tawarikh (Universal History), the Persian physician Rashid-al-Din Hamadani (also known as "Rashideddin", 1247â€“1318) refers to the Chinese practice of identifying people via their fingerprints, commenting: "Experience shows that no two individuals have fingers exactly alike."[65] In Persia at this time, government documents may have been authenticated with thumbprints.[citation needed]
Counterfeit banknote detection pen Counterfeit banknote detection pens are used to detect counterfeit Swiss franc, euro and United States banknotes, amongst others. Typically, genuine banknotes are printed on paper based on cotton fibers and do not contain the starches that are reactive with iodine. When the pen is used to mark genuine bills, the mark is yellowish or colourless.