A DNA blunder led to a teenager spending three months behind bars after he was accused of rape in a city he had never even visited.
Adam Scott, from Truro, Cornwall, was charged with attacking a woman in a park in Blackley, Manchester, after his gene test was mixed with a sample of the attacker's DNA that had been taken from the victim.
He had provided a sample in connection with another incident that was also being processed at a laboratory run by LGC Forensics.

Assistant Chief Constable Steve Heywood of Greater Manchester Police told the Daily Mirror that the teenager 'was absolutely adamant that he had never been to Manchester so that gave us some concern'.

He added: 'We went back to the supplier who was absolutely adamanant that this was not the case so we charged the man with Crown Prosecution Service support.

'Last week we were contacted by the supplier who said unfortunately the sample was contaminated.'

Police across the EU are to be given open access to the UK’s national DNA database, it was confirmed last night.
Forces in every member state will be able to check crime scene samples against millions of profiles held in this country.
Critics have warned it could lead to thousands more Britons facing extradition.
There is particular concern that innocent people could be identified as suspects – after evidence emerged from the Netherlands, which has been running the scheme for four years, of a worryingly high number of ‘false positive’ results.