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Why your fingerprints may not be unique

Source: telegraph.co.uk
Assumption that everyone has a unique fingerprint from which they can be identified through a computer database is flawed, says Home Office expert Mike Silverman


Fingerprint evidence linking criminals to crime scenes has played a fundamental role in convictions in Britain since the first forensic laboratory was set up in Scotland Yard in 1901.

But the basic assumption that everyone has a unique fingerprint from which they can be quickly identified through a computer database is flawed, an expert has claimed.

Mike Silverman, who introduced the first automated fingerprint detection system to the Metropolitan Police, claims that human error, partial prints and false positives mean that fingerprints evidence is not as reliable as is widely believed.

Nobody has yet proved that fingerprints are unique and families can share elements of the same pattern.

And there are other problems, such as scanning fingerprints of the elderly as their skin loses elasticity and in rare conditions leaves some people with smooth, featureless fingertips.

Mr Silverman, who was the Home Office’s first Forensic Science Regulator, said: “Essentially you can’t prove that no two fingerprints are the same. It’s improbable, but so is winning the lottery, and people do that every week.

“No two fingerprints are ever exactly alike in every detail, even two impressions recorded immediately after each other from the same finger.

“It requires an expert examiner to determine whether a print taken from crime scene and one taken from a subject are likely to have originated from the same finger.”

However there are numerous cases in which innocent people have been wrongly singled out by means of fingerprint evidence.

In 2004, Brandon Mayfield, was wrongly linked to the Madrid train bombings by FBI fingerprint experts in the United States.

Shirley McKie, a Scottish police officer, was wrongly accused of having been at a murder scene in 1997 after a print supposedly matching hers was found near the body.

“What both cases clearly demonstrate is that, despite the way fingerprint evidence is portrayed in the media, all comparisons ultimately involve some human element and, as a result, they are vulnerable to human error,” said Mr Silverman who has recently published his memoirs ‘Written in Blood’ and now works as a private forensic consultant.

[...]

Read the full article at: telegraph.co.uk



READ: The FBI and the Myth of the Fingerprint

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