Miriam Aroni Krinsky and Rebecca Blair: At its best, DNA testing can tell you whose genes were found in a particular location — but it can’t tell you how they got there. - NBCNewsTHINK
, in which law enforcement and prosecutors subconsciously discount evidence that points away from their chosen suspect.
To guard against mistakes, law enforcement and forensic scientists must set strict protocols for collecting and handling genetic material to ensure samples aren’t contaminated or degraded. Prosecutors should be educated on the developments in, and limitations of, DNA analysis and other forensic techniques, and defense attorneys should always be provided with equal access to evidence and testing, allowing them to probe potential errors.
Bryan Kohberger looks toward his attorney, public defender Anne Taylor, right, during a hearing in Latah County District Court on Jan. 5 in Moscow, Idaho.The growing use of forensic genetic genealogy — the practice of comparing crime scene DNA with existing DNA databases to identify close relatives of the perpetrators — raises additional concerns.
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