Natalia Zea reports for CBS Miami on a study of fingerprint match reliability.

The fingerprint examiners correctly matched every single print in the tests, with only 3 percent of the inaccurate matches caught by a second examiner, which is part of normal protocol at crime labs across the country.

That's rather awkward phrasing.  Presumably it means that 3 percent of the matches found by the first examiner were not correct but all of the errors were found and corrected on the second examination.