who is credited with developing the first classification system for fingerprints
Henry Classification System Although fingerprint characteristics were studied as far back as the mid-1600s, the use of fingerprints as a means of identification did not occur until the mid-19th century. In roughly 1859, Sir William James Herschel discovered that fingerprints remain stable over time and are unique across individuals; as Chief Magistrate of the Hooghly district in Jungipoor, India, in 1877 he was the first to institute the use of fingerprints and handprints as a means of identification, signing legal documents, and authenticating transactions. The fingerprint records collected at this time were used for one-to-one verification only; as a means in which records would be logically filed and searched had not yet been invented.
DNA profiling The modern process of DNA profiling was developed in 1984[5] by Sir Alec Jeffreys[6][7][8][9] while working in the Department of Genetics at the University of Leicester.[10]