A former forensic analyst with the Colorado Bureau of Investigation pleaded guilty Tuesday to four felony counts stemming from accusations that she manipulated and omitted data to speed up the DNA testing process, calling into question the validity of hundreds of criminal cases.

Yvonne "Missy" Woods entered guilty pleas to committing a cybercrime, perjury, attempting to influence a public servant and forgery. Dozens of other counts were dismissed as part of a plea agreement.

Woods was set to stand trial later this year. Instead, she'll face between 8 and 16 years in prison when she's sentenced in September.

Woods and her attorneys declined to talk to reporters after Tuesday's hearing.

Authorities accused Woods, who resigned in 2023 after a decades-long career, of altering data to conceal tampering, deleting data that showed she failed to troubleshoot issues within the testing process and not thoroughly documenting tests performed in case records.

The investigation into Woods' misconduct began in September 2023 after an intern at the bureau discovered missing information in a case that Woods handled in 2018. According to an arrest affidavit, Woods allegedly told investigators at one point that she had changed data to complete cases more quickly.

Problems with the scientist's work were found in cases involving homicide, sexual assault, robbery and other crimes, according to a law enforcement affidavit. Prosecutors were forced to review hundreds of cases.

At least one murder conviction was overturned as a result of Woods' misconduct. Michael Clark was released from prison in 2025 after his lawyers argued that DNA evidence in the case was mishandled by Woods, but prosecutors are seeking to retry him.

In at least two cases, both homicides, the defendants received lesser sentences under plea deals than they could have faced if they went to trial because prosecutors were afraid Woods' involvement could lead to acquittals. Convictions in other cases also are being challenged in courts across Colorado.

State officials have said that the response to Woods' actions could end up costing more than $11 million.

The state investigation bureau in a statement issued Tuesday described Woods' actions as intentional criminal fraud and said it didn't reflect the bureau's practices.

"This moment is not about moving on, for CBI it's about moving forward," said Armando Saldate, bureau director. "Today's guilty plea is an important moment of accountability."

The bureau said it has been making changes and is committed to following best practices used nationwide in forensic science.

The Supreme Court on Monday agreed to decide whether states can use juries made up of only six people in criminal cases, instead of the usual 12. The case puts a Florida chiropractor convicted of practicing with a suspended license in an unlikely leading role in a constitutional clash.

The justices will hear arguments in the fall in the case of Hamed Kian, who argues that a six-person jury violates his constitutional rights.

Florida uses six-person juries for all criminal cases that don't involve the death penalty. Five other states, Arizona, Connecticut, Indiana, Massachusetts and Utah, also conduct some criminal trials with six-member juries.

The 45-year-old Kian's license was suspended after three women who were his patients complained he either kissed or touched them inappropriately, according to court records.

Prosecutors sought an indictment after amassing evidence that Kian, who had an office in Jupiter, continued to see patients even after the suspension. He was convicted by a six-person jury.

Kian's lawyers argue that the smaller jury violates the Sixth Amendment, which guarantees "a speedy and public trial, by an impartial jury of the state."

The amendment does not explicitly set the size of the jury, but Kian's lawyers contend that the word jury could only have meant a body of 12 people at the time the amendment was adopted in 1791. Just over 100 years later, the Supreme Court ruled that juries had to have 12 people.

But in 1970, the justices changed course and ruled by a 7-1 vote that the number 12 was not sacrosanct, also in a case from Florida. Justice Thurgood Marshall was the only dissenter.

More recently, the court has placed renewed emphasis on the original understanding of the Constitution. In another Sixth Amendment case, the court ruled in 2020 that juries must be unanimous in criminal cases, effectively overturning a 1972 decision that had allowed for non-unanimous convictions in criminal cases in Louisiana and Oregon.

"The same reasoning applies to the historical right to a jury of twelve," Kian's lawyers wrote in their appeal to the court to step in. "When the People enshrined the jury trial right in the Constitution, they did not attach a rider that future judges could adapt it based on latter-day social science views."

In trying to persuade the Supreme Court to leave Kian's conviction in place, Florida Attorney General James Uthmeier wrote that the 1970 case was correctly decided and "overruling it also would imperil thousands of criminal convictions in Florida and five other states that for more than 50 years have relied on its rule."

The Supreme Court on Tuesday rejected a push to avoid a lawsuit alleging that Facebook and Instagram harmed young users, a decision that comes as social media companies increasingly face legal scrutiny.

Parent company Meta Platforms Inc. appealed after Vermont's highest court allowed a suit filed by its attorney general in 2023 to move forward. The company is facing similar lawsuits from states across the country, accusing it of knowingly designing addictive features.

Meta had argued that it can't be sued in Vermont court because neither the company nor the app design has specific ties to the state. Vermont countered that the sites' large number of teen users gives its courts jurisdiction.

The Supreme Court declined to hear the appeal in a brief, unexplained order, as is typical. The procedural decision comes after court losses for Meta and YouTube in social media addiction lawsuits in California and New Mexico.

Vermont's lawsuit was filed after an investigation by a bipartisan coalition of attorneys general in several states. Newspaper reports based on Meta's own research also found that the company knew about the harms Instagram can cause teenagers — especially teen girls — when it comes to mental health and body image issues. One internal study cited 13.5% of teen girls saying Instagram makes thoughts of suicide worse and 17% of teen girls saying it makes eating disorders worse.

Almost all teens ages 13 to 17 in the U.S. report using a social media platform, with about a third saying they use social media "almost constantly," according to the Pew Research Center.

Meta, for its part, has said that it has already introduced dozens of tools to support teens and their families and suggested it would have worked with the states on standards for youth social media use.

Vermont Attorney General Charity Clark applauded the decision, saying it affirms "that companies that choose to do business in Vermont, like Meta, can be held accountable when they harm kids."