An intern stumbled upon a data anomaly in 2023, and what followed may be one of the worst forensic science betrayals in American criminal justice history.
Story Snapshot
- Yvonne “Missy” Woods, a 29-year Colorado Bureau of Investigation (CBI) DNA analyst, pleaded guilty to four felonies in June 2026 after manipulating DNA evidence for at least 15 years.
- Her actions tainted more than 500 criminal cases, including sexual assault investigations where she falsely reported no male DNA was present when it was.
- The damage has already cost Colorado taxpayers more than $11 million to address.
- The case exposes a systemic problem: forensic labs across America operate with little independent oversight, and the consequences fall hardest on crime victims and the wrongly convicted alike.
An Intern Found What 29 Years of Oversight Missed
In September 2023, a college intern reviewing sexual assault kits noticed something odd in Woods’ work. That small anomaly cracked open a 15-year trail of manipulated DNA results.
Woods had deleted data to avoid extra testing steps, omitted results from official case files, and repeatedly ran samples until they produced the outcome she wanted.
She even asked a colleague to delete file versions, saying it was “a pain.” The Colorado Bureau of Investigation (CBI) launched an internal review and confirmed the pattern.[1]
JUST IN: Disgraced former Colorado Bureau of Investigation scientist Yvonne “Missy” Woods pleaded guilty to four felonies, closing a chapter in a years-long DNA testing scandal that continues to reverberate through the state’s criminal justice system. https://t.co/VKQwSwVrEr
— The Denver Post (@denverpost) June 23, 2026
What the CBI found was damning but also precise. Woods did not fabricate DNA matches from scratch or plant false profiles. Her affirmative matches may still hold up.
The cases most at risk are the ones where she reported negative results — no DNA found, no male contributor detected. Those are the cases where rapists may have walked free and where innocent people may have stayed locked up.[14]
102 Charges, a Guilty Plea on Just Four
Prosecutors charged Woods with 102 felonies: 52 forgery counts, 48 counts of attempting to influence a public servant, one perjury count, and one cybercrime count, covering alleged actions from 2008 to 2023.[2] She initially pleaded not guilty to all of them in February 2026. Then, in June 2026, she accepted a deal.
She pleaded guilty to four felonies — cybercrime, perjury, attempting to influence a public servant, and forgery — and prosecutors dropped the remaining 98 counts.[1]
Some will read that dismissal as a sign the prosecution overcharged. That’s a fair question. But four guilty felony pleas from a career forensic scientist, covering conduct she admitted to, is not a small outcome.
The guilty plea on perjury alone tells you she lied under oath. That is not a paperwork error. That is a choice made by someone who knew exactly what the justice system required of her and chose otherwise.[10]
Sexual Assault Victims Deserve a Straight Answer
The hardest part of this story is what happened in sexual assault cases. Woods falsely reported that no male DNA was present in multiple rape kits when small amounts of male DNA had actually been detected.[14] Those reports went into case files. Prosecutors and defense attorneys made decisions based on them.
Victims were told the evidence did not support what they knew happened to them. No number of dismissed felony counts changes what that means for those women.[1]
FORMER CBI DNA ANALYST MISSY WOODS PLEADS GUILTY, AVOIDS TRIAL ON MORE THAN 100 FELONY COUNTS
JEFFERSON COUNTY, Colo. — Former Colorado Bureau of Investigation forensic scientist Yvonne “Missy” Woods pleaded guilty Tuesday to four criminal counts, avoiding a trial that had been…
— D.M.G. (@DWildcard303007) June 23, 2026
Fixing this costs money. Officials say that addressing Woods’ misconduct has already cost more than $11 million.[2] That figure covers case reviews, retesting, legal challenges, and the bureaucratic weight of unwinding nearly three decades of tainted work. Colorado taxpayers are paying for a failure of oversight that should never have been allowed to run this long.
This Is Not a Colorado Problem — It Is an American Problem
Woods is not a one-off. The Innocence Project reports that misapplied forensic science contributed to more than half of all wrongful convictions in their database and nearly 25 percent of all wrongful convictions since 1989.[22]
Academic research on crime labs identifies high DNA backlogs as a key driver, pressuring analysts to cut corners and skip troubleshooting steps to keep case counts moving.[19] The pressure is real. But pressure does not explain why Woods asked a colleague to delete files. That is concealment.
The structural fix is straightforward, even if the political will to do it is not. Mandatory accreditation for all forensic labs, independent audits when misconduct is found, and real oversight that does not rely on an intern getting lucky — these are not radical ideas.[17]
They are the minimum a justice system owes to the people it is supposed to serve. Colorado learned that lesson the hard way. The rest of the country should not wait for its own intern to find the next anomaly.
Sources:
[1] Web – Former Colorado analyst pleads guilty in DNA testing scandal
[2] Web – Colorado DNA analyst appears on forgery charges as validity of …
[10] Web – Missy Woods, former forensic scientist accuses of mishandling DNA …
[14] Web – How Forensic Misconduct Can Unravel a Conviction
[17] Web – To build trust, forensic DNA labs must also embrace transparency
[19] Web – [PDF] THE CRIMES OF CRIME LABS – Hofstra Law
[22] Web – Misapplication of Forensic Science – Innocence Project
