– FBI recently said that “most of the experts in hair microscopy gave flawed testimony during a 25-year period, potentially affecting more than 3,000 defendants. In one particularly egregious case, two FBI forensic experts confused a human hair with a dog hair. The defendant served 28 years in prison before DNA evidence exonerated him.” The same problem exists with “other so-called eye-balling techniques such as bite marks, ballistics, and even fingerprints.”
“This is a mass disaster.”
Source: It’s terrifying that prosecutors are relying on hair microscopy – Business Insider