Yvonne “Missy” Woods, a former forensic analyst for the Colorado Bureau of Investigation (CBI), drew a 10-year prison sentence from a Colorado judge on Tuesday, September 8, 2026. Her manipulation of DNA data, authorities said, raised questions about the validity of hundreds of criminal cases — among them questions about the 1996 killing of JonBenét Ramsey.
State District Judge Andrew Poland delivered the sentence in Golden, Colorado. The plea agreement Woods reached in June had exposed her to a term of between eight and 16 years. She admitted guilt on four felonies under that deal — perjury, forgery, attempting to influence a public servant and committing a cybercrime — and prosecutors dropped dozens of additional charges. Her other three felony convictions carry concurrent sentences, and she also received three years of mandatory parole.
Addressing the court, Woods said she knew an apology would not undo the harm she had caused. “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,” she said.
Doubt about Woods’ work has rippled through Colorado courtrooms since 2023, reaching as far as the Ramsey killing. Boulder police and the Boulder County District Attorney’s Office say their review found that evidence in the Ramsey investigation was not affected by her misconduct. That documented criminal misconduct spans 2008 to 2023, and no authority has said she personally handled evidence in that case.
Where the Ramsey Investigation Stands
The Ramsey case itself, however, is moving. Investigators are reviewing evidence to determine whether it can benefit from newer forensic methods, Boulder authorities say, and independent outside laboratories with advanced DNA testing capabilities are among the options they are exploring. Detectives, the police department says, have conducted new and repeat interviews, collected new evidence and tested or retested material in an effort to develop leads. As of September 25, 2026, JonBenét Ramsey’s father was pushing for forensic genetic genealogy testing in the case.
Denver Reopens 13 Sexual Assault Cases
The fallout is still being counted. Retesting of DNA evidence tied to Woods’ work led Denver authorities to reopen 13 previously closed sexual assault cases, officials said in September. Of those, 11 yielded DNA profiles eligible for entry into CODIS, and six generated possible investigative leads.
Flawed work surfaced in homicide, sexual assault, robbery and other prosecutions, authorities said, and hundreds of files had to be re-examined. Michael Clark, whose lawyers argued that Woods had mishandled the DNA evidence in his case, walked out of prison in 2025 when at least one murder conviction was thrown out; prosecutors said they would seek to retry him. In two homicide cases, prosecutors feared her involvement would lead to acquittals and signed plea deals that gave the defendants lighter sentences than they might have faced at trial. Courts across the state are still weighing challenges to other convictions, and the response to her actions could end up costing more than $11 million, state officials have said.
Warnings Inside the State Crime Lab
It began with an intern. The intern at the bureau found information missing from a 2018 case Woods had handled, and the discovery touched off an investigation in September 2023. Woods was forced to retire on November 6, 2023. That ended a career of nearly 30 years, over which she had served as the state’s go-to expert in DNA analysis. The bureau made its investigation public in March 2024.
Her alterations to data concealed tampering, authorities said; she also deleted records that showed she had not troubleshot problems in the testing process, and case files went without full documentation of her tests. Questioned by investigators, Woods at one point offered speed as an explanation, saying she had altered data so she could close out cases faster, an arrest affidavit states. The bureau also found that she manipulated results involving male DNA in multiple cases — chart results that should have shown it were deleted, samples containing it were ignored, or reports incorrectly stated there was none — and officials considered those acts intentional.
In a news release on December 17, 2024, the CBI said the review of her entire body of work had been finished, and 1,003 cases were identified as “impacted” by the alleged mishandling and manipulation of evidence. “The comprehensive review of all the cases involving the nearly 30-year career of Yvonne ‘Missy’ Woods has been completed,” the agency said. Officials at the state level said the irregularities and possible dishonesty they uncovered made everything she had touched suspect.
Alarms had sounded far earlier, according to a 94-page internal affairs report that 20th Judicial District Court Judge Patrick Butler unsealed in the summer of 2024. Supervisors had heard from employees for years that Woods was cutting corners, and her testing of evidence drew a worker’s questions as early as 2014. One colleague reported watching her discard fingernail clippings the colleague believed had been collected as criminal evidence, but said she stayed quiet because of the favored status Woods enjoyed at the agency. The agency should have done more to protect the public, senior supervisors told internal affairs investigators.
An accusation of data manipulation in 2018 had already cost Woods her DNA casework for a time. Her bosses suspended her from criminal cases and ordered her into professional counseling. The CBI director never learned of that episode, nor did leadership at the Colorado Department of Public Safety, and how the bureau handled the report is now the subject of a separate investigation it has opened. Woods told investigators that she was a single mother putting her child through school and that she worked up to 40 hours of overtime a month to earn more money.
