Nassau County closed its crime laboratory in New York after it was discovered that police supervisors were aware examiners made inaccurate measurements in drug cases.
About nine thousand drug cases over the past three years are being checked for signs of errors after a spot check last week of nine cases involving ketamine, or Ecstasy, showed 6 were inaccurately analyzed.
Police knew problems with Ecstasy testing leading to the closing of the entire lab.
The lab also tested BAC in DUI cases.
An independent lab will be used for future analysis.
Criminal Defense lawyers and DUI attorneys are making motions questioning whether their clients received fair treatment, and asking that convictions be reversed.