This article is about errors in a set of population priors used in software. That could affect the outcome of tests, but it also might not. However, given that the FBI was recently caught having faked an entire field of forensic science (hair analysis), there is little reason to extend them the benefit of doubt.
The important question is: are these crime labs routinely processing control samples, and if so, are they misclassifying any of the control samples?
Polygraphs? They know full well polygraphs are not "lie detectors". And a lot of the general population knows that too. They're still useful when recruiting candidates. Obviously their results are not admissible in criminal cases.
The important question is: are these crime labs routinely processing control samples, and if so, are they misclassifying any of the control samples?