Chemist's Colleagues Had Questioned Her Work A chemist at the center of a drug lab testing scandal admitted she faked results for two to three years, forged signatures and skipped proper procedures, a police report shows. Some of Annie Dookhan's colleagues also had concerns for years about the high number of drug samples she tested and inconsistencies in her work, according to other police reports The Associated Press obtained Wednesday. Lab employees' interviews with investigators show they convinced themselves their concerns were invalid or reported them to supervisors who didn't intervene to stop Dookhan. Dookhan's mishandling of drug samples at the now-closed state lab in Boston has thrown thousands of criminal cases into question, authorities say. A handful of defendants already are free or have had their criminal sentences suspended. Concerns from Dookhan's colleagues prompted two supervisors to audit her work in 2010, but they just looked at paperwork and didn't retest drug samples. It wasn't until the spring of 2011, when police say Dookhan admitted forging a colleague's initials on paperwork after taking 90 drug samples from evidence, that things started to unravel for her. Another colleague told police it was "almost like Dookhan wanted to get caught." Anne Goldbach, forensic services director for the Committee for Public Counsel Services, which oversees the provision of legal representation for indigent people, said the new documents show the problems at the Hinton State Laboratory are more troubling than originally believed. She said it appears there was unsupervised access to the lab's evidence office and evidence safe. While Goldbach said she didn't see evidence of intentional wrongdoing by other chemists, she said that because Dookhan was in charge of quality control equipment other chemists could have gotten false test results without knowing it. "The fact that she failed to conduct quality control steps ... it calls into question all the testing done by the lab," Goldbach said. Attorney John T. Martin, who represents several defendants whose samples Dookhan handled, said he believes she changed drug weights to meet statutory standards for stricter sentencing. Martin said in the cases of four of his clients, Dookhan determined that the weight of the drug sample was just 1 gram above the amount needed for a more serious penalty even though police reports made the seizure seem smaller. Police say Dookhan told them several times in an August interview that she knew she had done wrong. "I screwed up big time," she said while becoming teary-eyed, according to the report by investigators for Attorney General Martha Coakley's office. I messed up bad. It's my fault. I don't want the lab to get in trouble. Authorities haven't filed charges against Dookhan or commented on her possible motives as their probe continues. In the Aug. 28 interview with two investigators at her dining room table, Dookhan first denied doing anything wrong when she analyzed drug samples. She changed her story after they confronted her with a Boston Police Department retest of a suspected cocaine sample that came back negative after Dookhan identified it as the narcotic. Police also told her the number of samples she reported analyzing was too high and she couldn't have done all the tests.