when did we start using dna to solve crimes
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]
Taq polymerase In the early 1980s, Kary Mullis was working at Cetus Corporation on the application of synthetic DNAs to biotechnology. He was familiar with the use of DNA oligonucleotides as probes for binding to target DNA strands, as well as their use as primers for DNA sequencing and cDNA synthesis. In 1983, he began using two primers, one to hybridize to each strand of a target DNA, and adding DNA polymerase to the reaction. This led to exponential DNA replication,[7] greatly amplifying the amounts of DNA between the primers.[3]