OMAHA, Neb. (AP) — The Douglas County crime lab director has been suspended and an investigation has been ordered for several cases handled by the lab.

Sheriff Tim Dunning put Tracey Ray on paid leave in October, and then on Jan. 6 suspended her without pay for 30 days. She’s appealing her suspension to the Douglas County Civil Service Commission.

A letter from Douglas County Chief Deputy Sheriff Tom Wheeler to Ray’s attorneys says a status review of cases she was working on “brought to light several potential issues involving the improper handling of evidence, to include packaging, labeling, storage and security.”

Ray was hired in 2010 after former crime lab chief David Kofoed’s (KOH’-fohd’s) conviction for planting evidence in a Cass County double murder.