Navigation Links
DNA conclusive yet still controversial, Carnegie Mellon professor says

Although the odds that DNA evidence found at a crime scene will match by chance the DNA of a person who was not there are infinitesimal, controversy continues about DNA identification and its use in criminal investigations, says Carnegie Mellon University Statistics Professor Kathryn Roeder. Roeder will present a historical overview of the use of DNA identification on Tuesday, April 25, during the Annual Symposia of the National Academy of Sciences in Washington, D.C.

Almost 28,000 cases nationwide have been prosecuted with help from the FBI's data bank of DNA profiles, while at least 170 people have seen their convictions overturned on appeal thanks to DNA evidence. Nonetheless, the use of DNA evidence in appeals has been impeded by political considerations and legal uncertainties, according to Roeder. "After all other legal avenues have been tried, the hope of any innocent person is that biological evidence from their cases still exists and can be subjected to DNA testing. But DNA's value to free the wrongfully convicted can be attained only if political leaders allow its full application," Roeder said. "Thousands currently await the evaluation of their cases."

In the early phases, technical disputes among scientists impeded the use of DNA evidence, Roeder said. One of the earliest controversies to erupt over DNA testing was the magnitude of genetic diversity among people of different ancestry.

Some controversy remains concerning the so-called "cold hit" technique, in which investigators search a DNA database to find a match of DNA found at a crime scene and then collect other evidence to build their case -- as opposed to first identifying a suspect through other evidence and then using DNA to confirm their case. Some critics claimed that this practice could snag an innocent person, but Roeder has demonstrated through her own research that the likelihood of a false hit are miniscule -- in one case, for example, it was about 1 in 26 quintill ion, a probability so slight it needn't be shared with juries, Roeder said.

"The jury can't handle such small numbers. We would do them a service to simply tell them it matches or it doesn't match," Roeder said.

Roeder began her career as a biologist, and much of her current research is focused on using statistical tools to understand the workings of the human genome and the nature of inherited diseases. She is a member of the Bioinformatics and Statistics Genetics Group, which includes researchers in the departments of Statistics and Biological Sciences at Carnegie Mellon, and the departments of Psychiatry and Human Genetics at the University of Pittsburgh. The group's primary research goal is to develop statistical tools for finding associations between patterns of genetic variation and complex disease.


'"/>

Source:Carnegie Mellon University


Related biology news :

1. Evidence for omega 3 fats less conclusive than we thought, say experts
2. South Africa still debating how to tackle HIV/AIDS when 5 million are infected
3. Human brain is still evolving
4. Genetic testing still smart choice, despite uncertainties
5. Tuberculosis still a risk for patients receiving HIV drugs
6. One-third of adults with diabetes still dont know they have it
7. Mice lacking key immune component still control chronic viral infections
8. Despite acidity, orange juice could still be a source of foodborne disease
9. Ten years later, Dolly is still making headlines
10. History-hunting geneticists can still follow familiar trail
11. Experimental vaccine given during pregnancy reduces stillbirths from common virus
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... Trends, opportunities and forecast in this market ... (fingerprint, AFIS, iris recognition, facial recognition, hand geometry, vein ... use industry (government and law enforcement, commercial and retail, ... others), and by region ( North America ... Pacific , and the Rest of the World) ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO of ... Rotary Club. The event entitled “Stem Cells and Their Regenerative Powers,” ... Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. Hanson, ...
(Date:10/10/2017)... CRUZ, Calif. , Oct. 10, 2017 ... grant from the NIH to develop RealSeq®-SC (Single Cell), ... kit for profiling small RNAs (including microRNAs) from single ... Analysis Program highlights the need to accelerate development of ... "New techniques for measuring ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee ... honoring scientists who have made outstanding contributions to analytical chemistry and applied ... the world’s leading conference and exposition for laboratory science, which will be held ...
(Date:10/9/2017)... ... October 09, 2017 , ... The award-winning American Farmer ... first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. , With ... with the challenge of how to continue to feed a growing nation. At the ...
Breaking Biology Technology: