http://www.philly.com/philly/news/20150512_FBI_hair_errors_call_convictions_into_question.html
Before DNA testing became the gold standard in forensic science, hair analysis was often a prosecutor's trump card.
Developed by the FBI's vaunted crime lab, microscopic hair analysis - comparing a hair found at a crime scene with one from a criminal defendant - as described in polished, confident testimony by an FBI hair analyst, could seal a guilty verdict.
Now, an ongoing FBI hair-analysis review - preliminary results were announced April 20 - recommends a wholesale look at cases in which testimony about microscopic hair analysis contributed to a guilty verdict.
The FBI review of about 500 transcripts of trials before 2000, when DNA testing supplanted microscopic hair analysis, shows FBI hair analysts made erroneous statements or exaggerated evidence in 96 percent of cases.
Read more at http://www.philly.com/philly/news/2...ctions_into_question.html#hUQSdqjBAFtWU11B.99
Before DNA testing became the gold standard in forensic science, hair analysis was often a prosecutor's trump card.
Developed by the FBI's vaunted crime lab, microscopic hair analysis - comparing a hair found at a crime scene with one from a criminal defendant - as described in polished, confident testimony by an FBI hair analyst, could seal a guilty verdict.
Now, an ongoing FBI hair-analysis review - preliminary results were announced April 20 - recommends a wholesale look at cases in which testimony about microscopic hair analysis contributed to a guilty verdict.
The FBI review of about 500 transcripts of trials before 2000, when DNA testing supplanted microscopic hair analysis, shows FBI hair analysts made erroneous statements or exaggerated evidence in 96 percent of cases.
Read more at http://www.philly.com/philly/news/2...ctions_into_question.html#hUQSdqjBAFtWU11B.99