Over the years there have been several high profile cases in the US where police officers and investigators have used publicly-accessible DNA databases to catch criminals.
There is debate over whether this is ethical but new research argues a universal DNA database in each country might be less discriminatory than current forensic practice.
Researchers suggest these are biased, as the databases contain DNA from mostly non-white, young people. James Hazel, the author of this paper, explains why.
The human DNA model takes on a double helix shape Photo: (Pixabay)
