INDIANAPOLIS (AP) — Authorities are double-checking DNA evidence in 64 criminal cases from Marion County over concerns a lab technician may have cut corners.

Prosecutors downplayed the potential impact of any retesting, saying the technician is not accused of improper testing — rather, they allege he failed to perform additional steps to verify tests' accuracy.

"We have no evidence that any of the test results have been tainted," said John Commons, the county prosecutor's chief of staff. "We have no reason to believe the new test results will be any different."

However, any errors that are discovered could lead to new trials. None of the defendants in the 64 cases faces the death penalty. Most of the cases involve rapes or killings.

"If it ends up actually clearing someone, so be it," Commons said.

Prosecutor Carl Brizzi asked police technicians to recheck every DNA match made by Dr. Kuppareddi Balamurugan, who resigned last August after six years at the Indianapolis-Marion County Forensic Services Agency. Prosecutors alleged he tried to save time by skipping additional verification steps.

Lab Director Jim Hamby said he expected the state police audit next week would validate the lab's work.

Police DNA testing procedures have also been questioned recently in Oklahoma and Houston.