The inquiry was also prompted by the Queensland Police Service requesting hundreds of rape cases to be retested by the lab,run by Queensland Health.
The cases in question involve low levels of DNA,often labelled as “DNA insufficient for further processing”.
Internationally,this testing of low-level DNA is accepted and used to successfully identify assailants,the inquiry heard.
The government announced in June,after a review of the lab earlier in the year,it would scrap that threshold,which had previously not allowed for further testing.
Authorities said the lab would return to 2018 testing standards as the probe continued.
The 2018 process involved concentrating samples before further testing.