Former Colorado analyst pleads guilty in DNA testing scandal

A former forensic analyst with the Colorado Bureau of Investigation (CBI) has pleaded guilty to four felony charges related to a widespread DNA testing scandal that has cast doubt on the integrity of hundreds of criminal cases. Yvonne "Missy" Woods, who worked for the CBI for several decades before resigning in 2023, admitted to manipulating and omitting data in order to expedite the DNA testing process. Her guilty plea covers charges including cybercrime, perjury, attempted influence of a public servant, and forgery. As part of a plea agreement, dozens of other charges against her were dismissed. She will now face sentencing in September, where she could receive a prison term ranging from eight to sixteen years.

According to court documents, Woods was accused of altering test results to hide errors, deleting data that revealed failures in troubleshooting the testing procedures, and failing to properly document all tests conducted. These actions reportedly affected numerous cases involving serious crimes such as homicide, sexual assault, and robbery. The investigation into her conduct began in September 2023 when an intern at the CBI noticed missing information in a case that Woods had handled in 2018. In an arrest affidavit, it was alleged that Woods had admitted to changing data to finish cases more quickly.

The impact of Woods’ misconduct has been far-reaching. At least one murder conviction was overturned due to concerns over the mishandling of DNA evidence. Michael Clark was released from prison in 2025 after his legal team argued that the evidence in his case had been compromised by Woods. However, prosecutors are currently seeking to retry him. Additionally, in at least two homicide cases, defendants received lighter sentences through plea agreements rather than facing potential trials, as prosecutors feared that any involvement of Woods might lead to acquittals. Convictions in other cases are also being challenged in courts throughout Colorado.

The financial repercussions of addressing the fallout from Woods’ actions are substantial. State officials estimate that the response to her misconduct could cost more than $11 million. This includes reviewing and potentially overturning convictions, retesting evidence, and implementing new safeguards to prevent similar incidents in the future.

The CBI has acknowledged the severity of Woods’ actions, describing them as intentional criminal fraud that does not represent the standards upheld by the bureau. Armando Saldate, the director of the CBI, stated that this moment is not about moving past the issue but about progressing forward. He emphasized that the guilty plea marks an essential step toward accountability. The bureau has since implemented changes aimed at aligning its practices with national standards in forensic science.

Woods and her legal representatives did not comment to reporters following Tuesday’s hearing. The case highlights broader concerns regarding the reliability of forensic evidence in criminal proceedings and underscores the need for rigorous oversight and transparency in forensic laboratories. The outcome of ongoing legal challenges and the long-term implications of this scandal remain uncertain, but the situation has already prompted significant scrutiny and reform efforts within the CBI and beyond.