Former CBI forensic scientist, Yvonne 'Missy' Woods, facing 102 felony charges
Jan 22, 2025
DENVER (KDVR) — A former forensic laboratory scientist, Yvonne "Missy" Woods, who worked for the Colorado Bureau of Investigation for nearly 30 years, is facing 102 criminal charges, according to the Colorado First Judicial District Attorney's Office.
Woods is accused of 58 instances of criminal misconduct from 2008 to 2023 during her career with CBI. She was employed by CBI from January 1994 to November 2023 and worked at two laboratories in Jefferson County. Questions about her work and processes were raised as long ago as 2014, even as management appeared to consider Woods a "golden child" who was "amazing" at forensic work.
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An arrest warrant for Woods was submitted by the First Judicial District Attorney's Office chief investigator on Tuesday. Woods turned herself into the Jefferson County Jail on Wednesday and is being held on a $50,000 cash-only bond.
"This strikes a blow to the confidence that all parties and the public has to scientific testing," said FOX31 Legal Analyst Chris Decker to FOX31's Gabby Easterwood. "The data is only as accurate as the human beings that are touching it, disclosing it and testifying about it."
Woods faces felony charges of:
Cybercrime
Perjury in the first degree
Attempt to influence a public servant (48 counts)
Forgery (52 counts)
Decker said he has spoken to individuals who were convicted in part by work completed by Woods and then used in court.
"I got a call today from an individual who suffered a conviction and received a letter from the CBI indicating that Mrs. Woods had done testing on his case," Decker told Easterwood. "I've gotten calls from other individuals who also got those letters from CBI who do have valid claims that the results of their trial or their decisions to plead guilty were materially affected by that testing."
In June 2024, a Boulder defendant in a case involving three killings in 2017 pleaded guilty to lesser charges after prosecutors offered a plea deal. The deal was offered partly because prosecutors were unable to call Woods to testify in the case. He could have faced life in prison without parole, but instead was sentenced to 42 years in prison with seven years of pre-sentence credit.
Charges follow investigation into Woods' work with CBI
In September 2023, an intern with CBI was reviewing quantification data in vestibular swabs within historical sexual assault cases. The intern discovered that in 2018, Woods processed a sample that was missing a quantification value although the male cycle threshold was noted in the sample.
An internal review ruled out the possibility of an instrument or quantification kit error and an internal investigation was conducted into Woods' workbooks around a similar time frame. Instead, CBI found that Woods "deviated from standard testing protocols and cut corners," raising questions about how reliable her testing may have been.
CBI: Over 1K cases impacted by former forensic scientist employed for decades
CBI found various data alterations and deletions in her workbooks related to "critical parts of the quality control process."
In the internal affairs report, Woods admitted to deleting some historical data on a DNA instrument, but she said she was advised to do so during quarterly maintenance. However, the manufacturer did not recommend the deletion, according to the internal report.
In November 2023, CBI requested an external investigation by the South Dakota Division of Criminal Investigation into the missing and altered data discovered. Nearly a year later, on Dec. 23, 2024, the South Dakota agency submitted its findings to the CBI which requested additional information and received the final batch of data on Jan. 15, 2025.
The investigation showed evidence of instances where Woods altered and deleted quantification values, re-ran batches of DNA multiple times without any documentation, and concealed possible contamination.
It also found evidence of Woods allegedly deleting specific values in submitted reports to agencies in 35 sexual assault cases, and at least seven homicide cases. The reports filed by Woods stated "No Male DNA Found" when small amounts of male DNA were detected or there was possible contamination which would have required additional testing and troubleshooting.
According to an arrest affidavit for Woods, investigators asked her about the alleged data manipulation, specifically the manipulated results. The affidavit said Woods "did not have a good answer" but provided a brief explanation.
"Like the analogy you used. I got to put out seven cases that day instead of five. I don't know," the affidavit says Woods stated.
The affidavit shows probable cause statements for 58 instances of criminal misconduct supporting criminal charges.
“We want to thank the South Dakota Division of Criminal Investigation for their diligence in conducting a complex investigation. Based on the available facts and after careful legal analysis, we have filed charges and will now proceed with a criminal prosecution. My office remains committed to reviewing all affected cases within our jurisdiction on behalf of the defendants and victims involved," said 1st District Attorney Alexis King in the Wednesday release.
CBI estimated that through 2024, fiscal costs from the alleged misconduct are around $11 million.
Agencies that received fraudulent reports
Adams County Sheriff’s Office, Arapahoe County Sheriff’s Office, Arvada Police, Aurora Police, Boulder County Sheriff's Office, Broomfield Police, Colorado Springs Police, Colorado State Patrol, Denver Police, El Paso County Sheriff's Office, Fort Collins Police, Fraser/Winter Park Police, Fremont County Sheriff's Office, Greeley Police, Lafayette Police, Lakewood Police, Larimer County Sheriff's Office, Longmont Police, Loveland Police, Pueblo Police, Rocky Mountain National Park Rangers, Thornton Police, University of Colorado Boulder Police Department, and Westminster Police.
CBI announced on Tuesday that it has hired a Wisconsin consulting firm to further assess CBI's “forensic services and operations as part of its promise for transparency, accountability, and providing accurate scientific results.”
Woods' first court appearance is scheduled for Jan. 23 at 10 a.m.