Navigation Links
Fraud attempt in a paternity test modifies action protocol in DNA tests
Date:4/10/2008

This release is available in Spanish.

Researchers from all over the world have been carrying out paternity tests regularly. Samples are usually collected from mouth and saliva cells to carry out the DNA analysis.

The team of Dr Jos Antonio Lorente Acosta (director of the Laboratory of Genetic Identification of the University of Granada) carries out these forensic studies commissioned by the court in cases of paternity tests, for the identification of possible criminals or to carry out DNA databases (such as in the case of missing relatives).

The detection of a fraud attempts in a paternity test case in 2007 is changing the action protocol of forensic teams in similar cases. The team of Dr Lorente encountered a strange case: the saliva analysis (epithelial cells from the interior of mouth) collected from a person undergoing a paternity test gave an incongruous result, a DNA which could not come from the man who had carried out the test.

The revision of the case revealed that they had followed the usual procedure: the suspect washed his mouth and after that they took the samples with a cotton swab. After repeating the analysis, there was an only one possible conclusion: In the mouth of that man there was DNA from two different persons. After dismissing other possibilities, the question was: how was it possible" We arranged to meet the person in question, we showed him the result and we explained him that we suspected that he had manipulated the samples which, as it was a trial in judicial investigation, could bring him serious consequences. Faced wit the evidence, he admitted that, shortly before the sample taking, he put into his mouth some saliva he kept in a little container.

It was n attempt to evade the responsibility in a case of extramarital paternity demand, and he admitted that, when 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.


'/>"/>

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

Related biology news :

1. Answer to troublesome question of why some genetic assoc. studies have failed replication attempts
2. Facial attraction -- choice of sexual partner shaped the human face
3. Interaction of just 2 genes governs coloration patterns in mice
4. Hidden interactions between predators and prey: evolution causes cryptic dynamics in ecology
5. Voice Biometrics Gains Traction as Most Accurate and Convenient Technology to Secure Customer Privacy
6. Skin oil -- ozone interactions worsen air quality in airplanes
7. Gray whales a fraction of historic levels, genetic research says
8. Keck Foundation funds study of biological interactions with nanomaterials
9. Neuronal conduction of excitation without action potentials based on ceramide production
10. Majority of Americans want local action on global warming, says poll
11. Odd protein interaction guides development of olfactory system
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fraud attempt in a paternity test modifies action protocol in DNA tests
(Date:1/15/2016)... , Jan. 15, 2016 Recent publicized ... small to find new ways to ensure data security ... iOS and Android that ties ... biometrics, transforming it into a hardware authorization token. Customer ... swipe their fingerprint on their KodeKey enabled device to ...
(Date:1/13/2016)... January 13, 2016 ... addition of the  "India Biometrics Authentication ... Forecast (2015-2020)"  report to their ... has announced the addition of the  ... - Estimation & Forecast (2015-2020)" ...
(Date:1/11/2016)... CHICAGO , Jan. 11, 2016  higi, ... via nearly 10,000 retail locations, web and mobile, ... than $40 million from existing investors. ... will be devoted to further innovate higi,s health ... app and web portal – including expanding services ...
Breaking Biology News(10 mins):
(Date:2/12/2016)... N.J. , Feb. 12, 2016  PTC ... the second annual STRIVE (Strategies to Realize Innovation, ... muscular dystrophy (DMD). STRIVE provides funds to patient ... that will make meaningful contributions to the rare ... fostering development of future patient advocates. ...
(Date:2/11/2016)... Inc. (NASDAQ: NBIX ) today announced its financial results for ... --> --> For the fourth quarter of ... $0.34 loss per share, compared to a net loss of $19.4 ... 2014. For the year ended December 31, 2015, the Company reported ... as compared to a net loss of $60.5 million, or $0.81 ...
(Date:2/11/2016)... NEW YORK , Feb. 11, 2016  Bioethics International, ... how medicines are researched, developed, marketed and made accessible to ... BMJ Open had named the publication of the ... for 2015. The publication is also featured as one of ... published in the last year that are most frequently read. ...
(Date:2/11/2016)... NY (PRWEB) , ... February ... ... a business-to-business publication dedicated to delivering cutting-edge information focused on the development ... Life Sciences to become a premier sponsor of the 2016 BioProcess International ...
Breaking Biology Technology: