A former forensic analyst for the Colorado Bureau of Investigation was sentenced to 10 years in prison in Golden, Colorado, on Tuesday after admitting she manipulated DNA data across hundreds of criminal cases over decades, a scandal that has triggered costly state reviews and overturned convictions.
A Jefferson County courtroom delivered a decade-long prison sentence to Yvonne “Missy” Woods, bringing a significant milestone to a yearslong forensic scandal that has reverberated through Colorado’s justice system. Woods, 66, spent 29 years working as a scientist for the Colorado Bureau of Investigation before retiring in 2023.
Guilty Pleas and Judicial Consequences in Golden
State District Judge Andrew Poland presided over the sentencing hearing in Golden, Colorado, where Woods faced between eight and 16 years in prison under the terms of a plea agreement. In June, Woods pleaded guilty to four felonies: perjury, attempting to influence a public servant, forgery, and committing a cybercrime. Dozens of additional counts were dismissed as part of the deal with prosecutors.
Judge Poland imposed a 10-year prison sentence for the cybercrime count, alongside concurrent sentences of six years for perjury, six years for influencing a public servant, and three years for forgery. During the proceedings, the judge emphasized the severe breach of professional responsibility committed by the veteran analyst.
“At its core, this case is about trust — the extraordinary trust placed in Ms. Woods, and her breach of that trust.”
Jefferson County District Judge Andrew Poland, via The Colorado Sun
Judge Poland noted that the intentional nature of the conduct by a highly trained professional carried substantial weight regarding punishment, accountability, and general deterrence.
Methods of Manipulation and Extent of the Scandal
Investigators and prosecutors revealed a pattern of data alteration that spanned more than 100 cases examined during formal reviews, though authorities have ultimately scrutinized more than 1,000 cases involving Woods’ work across her career from 1994 to 2023. According to an arrest affidavit, Woods altered data to conceal tampering, deleted files that showed she failed to troubleshoot testing issues, and neglected thorough documentation in case records.
Darren Kafka, senior deputy district attorney for the First Judicial District Attorney’s Office, detailed how Woods manipulated testing files during the hearing. He stated that Woods went into batch notes to add zeroes or increase values, distorting the ratio of male DNA to total human DNA. She also repeated tests without documentation and uploaded multiple conflicting versions of test results, violating agency policies.
Internal reviews indicated that warning signs appeared long before the formal criminal probe began. An internal affairs report showed that a coworker first questioned Woods’ testing methods in 2014, and she was temporarily removed from DNA casework in 2018 following data manipulation accusations. The active criminal investigation launched in September 2023 after a bureau intern discovered missing information in a 2018 case handled by Woods.
Impact on Convictions and Courtrooms Across Colorado
The fallout from Woods’ misconduct has forced prosecutors to re-examine homicide, sexual assault, and robbery cases throughout the state. In one prominent case, a murder conviction against Michael Clark was vacated, and he was released from prison in 2025 after defense lawyers argued DNA evidence was mishandled. Prosecutors stated their intention to retry him.
In other instances, fear of acquittals prompted prosecutors to offer lesser plea deals in homicide cases rather than risk trial with compromised evidence. State officials estimated that the response to Woods’ actions could end up costing more than $11 million.
Apology From the Defendent and Institutional Response
During the three-hour hearing, Woods addressed the court with a tearful apology, acknowledging the widespread uncertainty her actions created for defendants, victims, and her former colleagues.
“For many years I was entrusted with evidence that could have profound consequences for defendants, victims, families and the courts. I failed that responsibility. I am deeply sorry for that failure.”
Yvonne “Missy” Woods, former CBI forensic analyst, via The Guardian and NBC News
When questioned by investigators about why she altered the data, Woods admitted she struggled to find an explanation, describing it in a recorded interview as a disconnect.
Bureau Director Armando Saldate emphasized that the agency has sought to implement laboratory reforms and rebuild public confidence in the wake of the scandal. He noted that the actions of a single individual do not reflect the dedication of the broader workforce.
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