For nearly three decades, Yvonne “Missy” Woods occupied the kind of position that required almost absolute trust.
She was not the police officer who made the arrest or the prosecutor who stood before a jury. She worked behind the scenes at the Colorado Bureau of Investigation, examining biological evidence and producing scientific reports that could help determine whether a criminal investigation moved forward, whether a suspect was charged, and sometimes whether a person went to prison.
Her conclusions carried the authority of science.
Then, in September 2023, an intern noticed something missing.
That discovery eventually exposed one of the most serious forensic-laboratory scandals in Colorado history. Investigators determined that Woods had manipulated DNA data across hundreds of cases, and prosecutors later identified dozens of cases in which her work resulted in false or misleading laboratory reports. On September 8, 2026, District Court Judge Andrew Poland sentenced the former CBI forensic scientist to 10 years in state prison. (firstda.co)
The detail now spreading rapidly online is particularly disturbing: 32 cases involved women and children who had reported sexual assault. Prosecutors say Woods deleted values showing that male DNA was present and then issued reports stating that no male DNA had been found. (firstda.co)
But the viral graphic leaves out important context.
Authorities did not say Woods invented DNA profiles or falsely identified innocent people as DNA matches. Nor did investigators conclude that all 32 sexual-assault allegations were therefore proven.
What Woods did, prosecutors say, was different but enormously consequential: she altered the scientific record and eliminated opportunities for evidence to undergo further testing, comparison and investigation. (firstda.co)
That distinction matters.
And it makes the full story no less alarming.
One Intern Found Something That Wasn’t Supposed to Be Missing
The scandal began with an observation that could easily have been overlooked.
In September 2023, an intern at the Colorado Bureau of Investigation was examining a DNA sample Woods had processed in 2018 and noticed missing data.
The discovery triggered a broader review.
Investigators began finding similar alterations and deletions. The CBI eventually asked the South Dakota Division of Criminal Investigation to conduct an independent criminal investigation into Woods’ work. (firstda.co)
What followed was staggering.
Woods had worked for the CBI from January 1994 until November 2023, a career spanning nearly 30 years. She worked at two laboratory locations in Jefferson County and handled evidence connected to serious criminal investigations.
Authorities ultimately filed 102 criminal counts against her involving conduct between 2008 and 2023. (firstda.co)
And the number of cases requiring scrutiny extended far beyond those underlying the criminal charges.
An internal CBI investigation previously found problems connected to more than 1,000 cases over the course of Woods’ career, while prosecutors say manipulation within her laboratory notes affected hundreds of additional cases beyond the 53 cases at the center of the false-or-misleading-report investigation. (Axios)
Suddenly, cases once considered finished had to be reopened and questioned.
Then Investigators Found the 32 Sexual-Assault Cases
The criminal investigation focused particularly on cases in which Woods’ manipulation resulted in a false or misleading laboratory report that required correction.
Investigators identified 52 reports containing statements by Woods that were untrue.
In another case, prosecutors said her statements were technically accurate but appeared designed to discourage a detective from acting on the results.
That produced 53 cases at the center of the prosecution.
Of those, 41 never resulted in criminal charges against a suspect.
And 32 of those 41 involved women and children who had reported sexual assault. (firstda.co)
It is what prosecutors say happened inside those laboratory files that has now caused outrage far beyond Colorado.
According to the First Judicial District Attorney’s Office, Woods deleted values indicating that male DNA was present.
She then issued reports saying that no male DNA had been found. (firstda.co)
That doesn’t automatically mean the DNA belonged to an assailant. Biological evidence can require additional testing and interpretation before investigators can determine its relevance or identify a source.
But because the values were removed and the reports said no male DNA had been detected, prosecutors say investigators lost the opportunity to pursue precisely those next steps.
“Her conduct eliminated opportunities for additional testing, comparison and investigation,” the DA’s office said. (firstda.co)
For some cases, that was where the process stopped.
The Viral Claim Is Essentially True — but Needs One Crucial Clarification
The graphic circulating online says Woods “deleted male DNA in 32 sexual assault cases, then reported none was found.”
That is substantially consistent with the prosecutor’s official account.
But it can easily be interpreted to mean something broader than investigators actually established.
Authorities have specifically said the criminal investigation did not uncover evidence that Woods created false DNA identifications, false comparisons or false-positive results. (firstda.co)
In other words, this was not a finding that she planted DNA belonging to innocent people.
Nor does the discovery of male DNA by itself establish who committed a crime.
Instead, prosecutors say Woods removed information that should have remained available to investigators and then produced reports that falsely described what the testing had detected.
That interference could affect both sides of a criminal case.
For victims, potentially useful evidence may never have received the investigation it deserved.
For defendants, Woods’ misconduct means evidence presented as objective forensic science can no longer automatically be trusted.
That is why the consequences have become so enormous.
And Sexual-Assault Investigations Were Only Part of It
Twelve of the false reports were connected to cases in which criminal charges actually were filed.
Three reached trial.
One resulted in a conviction.
Two ended in acquittals.
Of the other nine cases, six ended in plea agreements, two were dismissed and one remained in warrant status when prosecutors announced Woods’ sentence. (firstda.co)
And Woods’ work touched homicide cases as well.
One of the most consequential involved Michael Clark, who had been convicted in connection with the 1994 killing of Marty Grisham in Boulder.
Clark’s conviction was overturned, and he was released from prison in 2025 after his attorneys challenged DNA evidence handled by Woods. Prosecutors have said they intend to retry him. (AP News)
Other defendants have challenged their convictions, while prosecutors in two homicide cases accepted reduced sentences partly because Woods’ involvement created uncertainty about what might happen if the cases proceeded to trial. (AP News)
This is the nightmare scenario when confidence in forensic science collapses.
It doesn’t simply help defendants.
It doesn’t simply hurt prosecutors.
It throws uncertainty over everyone.
Woods Even Admitted to Perjury
The misconduct wasn’t confined to laboratory paperwork.
Woods pleaded guilty to first-degree perjury based on false testimony she gave during a trial that resulted in a first-degree murder conviction. (firstda.co)
That transformed the case from a story about poor laboratory practices into something much more serious.
A forensic scientist testifying in court isn’t merely offering an opinion.
Jurors may view that person as the neutral scientific authority in the courtroom.
When a scientist explains DNA evidence, the testimony can carry extraordinary weight precisely because jurors are expected to believe that the underlying testing has been performed objectively.
Judge Poland focused on that breach of trust when sentencing Woods.
He described what happened as “intentional misconduct by a highly trained professional occupying a position of extraordinary trust.” (firstda.co)
Her responsibility, he said, had been straightforward: perform the science accurately, follow the proper procedures, report the results and allow other people in the justice system to decide what those results meant.
“She failed to do that,” the judge said. (firstda.co)
Warning Signs Had Appeared Years Earlier
Perhaps one of the most troubling parts of the story is that questions about Woods’ work did not suddenly appear in 2023.
According to the CBI’s internal investigation, concerns stretched back years.
A colleague raised questions about Woods’ testing as early as 2014. Then, in 2018, she was temporarily removed from DNA casework after allegations involving data manipulation.
Yet she ultimately continued working.
The scandal wasn’t fully exposed until 2023. (AP News)
That has inevitably created a second question alongside the one about Woods herself:
How could the system have failed to catch the problem earlier?
The CBI has since undertaken reforms intended to strengthen laboratory oversight and rebuild confidence in its forensic work.
But correcting procedures going forward cannot resolve what happened in cases that are already years or even decades old.
The Price of Rechecking Everything Could Exceed $11 Million
Once confidence in Woods’ work collapsed, Colorado faced a massive practical problem.
Evidence had to be reviewed.
Cases had to be identified.
DNA sometimes needed to be retested.
Prosecutors had to reconsider convictions.
Defense attorneys had to determine whether Woods’ involvement created grounds for new legal challenges.
The cost associated with responding to the scandal has been estimated at more than $11 million. (AP News)
And money is arguably the easiest part to quantify.
It is far harder to measure what happens when victims are told that evidence from cases they thought had been properly investigated may have been compromised.
It is equally difficult to measure what happens to defendants who spent years believing the scientific evidence used against them was unquestionably reliable.
Chief Deputy District Attorney Darren Kafka described Woods’ actions as “appalling.”
He said the damage extends to victims who may believe they were denied justice, defendants who now have reason to question whether they were treated fairly, and the investigators, lawyers and forensic professionals left trying to reconstruct what happened. (firstda.co)
In June, Woods Finally Pleaded Guilty
Woods initially faced a sprawling criminal prosecution.
Earlier in 2026, she pleaded not guilty to 102 felony charges. A five-week trial had been scheduled for September.
But that trial never happened.
On June 23, Woods entered a plea agreement and pleaded guilty to four felonies: cybercrime, first-degree perjury, attempting to influence a public servant and forgery. (firstda.co)
The agreement required her to accept responsibility for the full scope of the criminal conduct and guaranteed prison rather than probation.
She faced between eight and 16 years.
Then came September 8.
Woods entered the courtroom knowing she would not leave a free woman.
“I Failed That Responsibility”
Before Judge Poland imposed the sentence, Woods addressed the court.
Her statement was considerably different from the scientific language that had surrounded the case for years.
She acknowledged that her actions affected not simply laboratory records but real people.
“For many years, I was entrusted with evidence that could have profound consequences for defendants, victims, families and the courts,” she said.
Then came the sentence at the heart of her apology:
“I failed that responsibility.” (firstda.co)
She said she knew an apology could not undo the damage and expressed deep regret for what had happened.
The court nevertheless concluded that the seriousness of the misconduct demanded a substantial prison sentence.
The Judge Gave Her 10 Years
Woods received 10 years in the Colorado Department of Corrections on the cybercrime conviction.
Her other sentences run concurrently: six years for perjury, six years for attempting to influence a public servant and three years for forgery.
That means her controlling sentence is 10 years. (firstda.co)
The sentence falls roughly in the middle of the eight-to-16-year range established by the plea agreement.
And while it closes Woods’ criminal prosecution, it does not close the larger scandal.
The DA’s office made that explicit.
Cases are still being reviewed individually.
Litigation connected to Woods’ work continues.
And Colorado’s forensic system is still dealing with the consequences.
Some Cases Are Still Unraveling
The fallout is not theoretical.
In August 2026, a Colorado judge dismissed a felony child-sexual-assault prosecution after finding “outrageous government conduct” connected to the Woods scandal. Prosecutors appealed the ruling, which could eventually have implications for other cases involving her work. (Axios)
That illustrates the impossible position created by compromised forensic evidence.
Victims may have waited years for their cases to reach court.
Defendants have constitutional rights to reliable evidence and fair proceedings.
Prosecutors cannot simply pretend a compromised laboratory record is trustworthy because throwing it out would be inconvenient.
And judges must decide how much misconduct is enough to make a prosecution fundamentally unfair.
Those questions will continue long after Woods begins serving her sentence.
The 32 Women and Children Are Why This Story Hits Differently
Statistics can make the scandal difficult to comprehend.
More than 1,000 cases reviewed.
Hundreds affected.
Dozens of false reports.
More than $11 million.
Ten years in prison.
But behind one particular number are 32 sexual-assault investigations involving women and children.
According to prosecutors, these were people who reported being sexually assaulted and expected the evidence they provided to be processed accurately.
Instead, Woods deleted values indicating male DNA and reported that none had been found. (firstda.co)
District Attorney Alexis King put the human cost into words after sentencing.
“These women and children, and the detectives entrusted with their stories, believed their evidence would be handled honestly and carefully,” she said. (firstda.co)
They believed science would simply report what science found.
That is the promise at the center of forensic evidence.
And that is precisely the promise Woods violated.
One Important Fact Shouldn’t Get Lost in the Outrage
There is a temptation with a case this shocking to push the facts further than investigators themselves have.
That would be a mistake.
Prosecutors have not said that every affected sexual-assault report was proven true because male DNA was detected.
They have not said Woods framed innocent people by manufacturing DNA matches.
And they have specifically said the investigation found no evidence that she produced false DNA identifications, comparisons or false-positive results. (firstda.co)
The established misconduct is serious enough without embellishment.
She interfered with scientific data.
She produced false or misleading reports.
She gave false testimony in a murder trial.
And in 32 sexual-assault cases involving women and children, prosecutors say she removed male-DNA values and then reported that male DNA had not been found.
Those are the facts.
Ten Years Ends Her Case — Not Colorado’s
After Woods was sentenced, CBI Director Armando Saldate described her behavior as both a violation of law and a betrayal of the scientific principles expected inside the agency’s laboratories.
He also made an important distinction.
“The actions of one individual never define this organization,” Saldate said. (firstda.co)
The CBI says it has introduced substantial reforms intended to strengthen its laboratories and restore public confidence.
But institutional trust is much easier to destroy than rebuild.
Every affected case now has its own history, its own evidence and its own people waiting for answers. Some may ultimately be unaffected by Woods’ misconduct. Others could lead to new trials, dismissed charges or renewed investigations.
The criminal prosecution of Yvonne “Missy” Woods is over.
The consequences of what she did are not.
And perhaps the most unsettling part of the entire story is how it began: not with an elaborate investigation or a dramatic confession, but with an intern looking at an old DNA file and realizing that something simply wasn’t there.
One missing piece of data opened the door.
Behind it were years of manipulated evidence, damaged investigations and questions Colorado may spend years trying to answer.
Woods will now spend the next chapter of that reckoning in prison.
She was sentenced to 10 years.
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