Fraud attempt in a paternity test modifies action protocol in...(en he mixed his saliva with someone else...)

Date:4/10/2008

en he mixed his saliva with someone elses, he attempted to "mislead" the experts in forensic genetics and, through them, the judge. After repeating the test it was revealed (with a probability of more than 99, 999998%) that he was the biological father in that case of judicial investigation.

Consequences

The referred case gains a special importance as this is the first time it has been described that someone has mixed two types of saliva in order to alter a DNA test; manipulation attempts in blood samples had been described before (with transfusions antes before the sample taking, for example).

We must highlight points out Lorente- that the alteration of DNA tests is almost impossible without forensic experts realizing it, but this case aroused the interest of the scientific community after its publication in the journal of the American Academy of Forensic Sciences. The reason is obvious: It raises the need of adopting special measures to prevent experts error leading to crime or fraud or lack of punishment. From this publication, many protocols of saliva taking for forensic analysis (cases of paternity, crime suspects, and DNA databases) include the obligation for saliva donors to wash their mouth out with water before a witness, just before he places the swab in his mouth to collect saliva samples.

This case was studied by FBI experts (USA), interested in preventing possible manipulation attempts of the tests, and one of them, Dr Bruce Budowle, is co-author of the work.

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Contact: Jose A. Lorente jlorente@ugr.es Universidad de Granada Source:Eurekalert

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