DNA super-network increases risk of mix-ups

The New Scientist
PETER HAMKIN was pulling pints in a bar in Merseyside, UK, in 2003, when he was arrested on suspicion of murdering a woman in Italy a year earlier. Italian police had requested a search of the UK DNA database and claimed he was a perfect match, and that he fitted witness descriptions of the murderer. After a 20-day ordeal, a second DNA test ruled Hamkin out and he was released without charge.