According to a state police report, a chemist in the state lab scandal has admitted she faked test results.

Annie Dookhan reportedly told investigators that for about three years she would just look at some evidence and label it what she thought it might be.

Dookhan handled the evidence in a case involving one of defense attorney Patricia DeJuneas' clients.

Investigators have found Dookhan's supervisors were concerned since 2007 about the high volume of drug tests she was doing on a monthly basis.

The outcome of tens-of-thousands of drug cases are now in doubt. (AP)