David Kaye: Sure. I'm a professor of law at the University of California, Irvine, where I teach criminal procedure and evidence. I've been working on issues related to DNA evidence for over 20 years. I became interested in this area after I read an article about the case of Barry Scheck and Peter Neufeld, who were representing a man on death row who had been convicted of rape based on eyewitness testimony. They were able to get him exonerated after they obtained DNA testing that showed he was innocent. That case really opened my eyes to the potential of DNA evidence to help exonerate innocent people.
Interviewer: What are some of the main problems with DNA evidence?
David Kaye: There are a number of potential problems with DNA evidence, including:
* Contamination: DNA evidence can be easily contaminated, which can lead to false results. For example, if a DNA sample is not properly collected or stored, it could be contaminated with DNA from another person, such as a police officer or laboratory technician.
* Misinterpretation: DNA evidence can also be misinterpreted, especially by inexperienced analysts. For example, an analyst might mistakenly interpret a DNA profile as matching a suspect's DNA when it actually does not.
* False positives: DNA evidence can also produce false positives, which occur when a DNA profile is mistakenly identified as matching a suspect's DNA when it actually belongs to someone else. False positives can be caused by a number of factors, including contamination, misinterpretation, or laboratory error.
Interviewer: What are some of the things that can be done to minimize these problems?
David Kaye: There are a number of things that can be done to minimize the problems with DNA evidence, including:
* Using rigorous quality control measures: Laboratories that process DNA evidence should follow strict quality control measures to minimize the risk of contamination and misinterpretation. These measures should include using separate facilities for different types of DNA analysis, using trained and experienced analysts, and following standardized protocols.
* Requiring independent review of DNA evidence: All DNA evidence should be independently reviewed by a second analyst before it is used in court. This can help to catch any errors that may have been made by the first analyst.
* Educating judges and lawyers about DNA evidence: Judges and lawyers need to be educated about the potential problems with DNA evidence so that they can properly assess the weight of this evidence in court.
Interviewer: Thank you for sharing your insights, David. I think this information will be very helpful to our viewers.
David Kaye: You're welcome. I'm glad I could help.
