Las Vegas murder case cracked with smallest ever amount of DNA

The 1989 murder of a 14-year-old girl in Las Vegas has been solved by using what experts say is the smallest-ever amount of human DNA to crack a case. Stephanie Isaacson's murder case had gone cold until new technology made it possible to test what little remained of the suspect's DNA: the equivalent of just 15 human cells.
Read more: https://www.bbc.co.uk/news/world-us-canada-57947785?source=Snapzu