Skip to main content

Scientist’s behavioral issues cast doubt on Ohio convictions

Dozens, if not hundreds, of criminal convictions in Ohio could be in jeopardy because a longtime forensic scientist at the state crime lab now stands accused of slanting evidence to help cops and prosecutors build their cases.

The credibility of G. Michele Yezzo, who worked at the Ohio attorney general’s Bureau of Criminal Investigation for more than three decades, has been challenged in two cases in which men were convicted of aggravated murder. One has been freed from prison because of her now-suspect work.

A review of her personnel records by The Dispatch shows that colleagues and supervisors raised questions about Yezzo time and again while she tested evidence and testified in an uncounted number of murder, rape and other criminal cases in the state.

Their concerns included that she presented evidence in the best light for prosecutors instead of objectively, used suspect methods while examining trace evidence from some crime scenes, and made mistakes that, as one former attorney general put it, “could lead to a substantial miscarriage of justice.”

Yezzo, 63, of West Jefferson, told The Dispatch that the accusations about her work being biased are wrong and that she approached her work objectively.

“I have never done anything to overstate analysis of evidence, nor have I done anything, for lack of better a word, to taint the evidence,” Yezzo said. “No, I didn’t appease prosecutors and law enforcement. I bent over backwards to try and find out whatever evidence was there, and that’s the best I can tell you.”

But two former attorneys general, defense attorneys, a judge, a former BCI superintendent and a nationally renowned forensic expert from the FBI all say that Yezzo has credibility issues that may have poisoned cases she touched.

Lee Fisher, who served as attorney general from 1991 to 1995, and Jim Petro, who served as attorney general from 2003 to 2007, both said they didn’t know of Yezzo when they were in office, but they now have concerns about her work.

“I would call for an investigation into every case where her findings and conclusions were instrumental in the final result of a case,” Fisher said. “We have an obligation to the integrity of the criminal-justice system to investigate every case. We have to determine whether her findings or conclusions were suspect.”

Ohio Attorney General Mike DeWine said Friday that his office was alerted to the concerns about Yezzo in 2015 and has since conducted two separate reviews of her work. One involved examining 100 criminal cases where Yezzo’s evidence analysis played a role in a conviction.

DeWine said they found no issues with her work.

Moving forward, DeWine, who did not serve as attorney general during Yezzo’s tenure, said he has no plans for an internal investigation into Yezzo’s history, but he will have open discussions with defense attorneys on a case-by-case basis if they raise questions.

He said the BCI, which handles about 37,000 cases a year, has a “long history of doing good work” and has received the highest level of accreditation.

More than 800 pages of Yezzo’s personnel records paint a disturbing pattern of behavior that started shortly after she walked in the BCI doors in 1976. The concerns escalated over time until she resigned in 2009.

Over the 32 years that Yezzo worked in the crime lab, her bad behavior intensified to the point that colleagues questioned her mental health.

In the records, colleagues and supervisors described these concerns about Yezzo: She threatened to use a gun to shoot her co-workers and herself. She threw a 6-inch metal plate at one co-worker. She exposed her breasts to BCI agents at a bar, flipped off her boss and acted in a hostile manner to almost every lab employee, according to records. She was accused of calling an African-American scientist a racial slur, something Yezzo denies. She frequently broke into crying spells for no apparent reason.

Forensic scientists quit because of her erratic behavior. At one point her union, the Fraternal Order of Police, refused to back her.

Yezzo admits to the majority of the behavior described in her personnel file.

She attributed her erratic and sometimes abusive actions to intense pressure within the BCI to handle an enormous caseload as its lead forensic analyst.

She said the bureau was usually short-staffed and had difficulty keeping up with the workload. She also said she was having problems in her personal life. Those issues related to the loss of her sister and her mother moving in with her after the death.

She doesn’t believe her behavior affected her work.

Yezzo received numerous verbal reprimands and was suspended in 1993. But her analysis of evidence continued to be used in many high-profile felony cases despite the concerns about her work and behavior inside the state’s crime lab in London, where forensic scientists examine and analyze evidence from crime scenes across Ohio.

Click here to read the full article


Source: The Columbus Dispatch, Mike Wagner, Jill Riepenhoff, Lucas Sullivan & Earl Rinehart, October 30, 2016

⚑ | Report an error, an omission; suggest a story or a new angle to an existing story; send a submission; recommend a resource; contact the webmaster, contact us: deathpenaltynews@gmail.com.


Opposed to Capital Punishment? Help us keep this blog up and running! DONATE!

Most viewed (Last 7 days)

Former Florida officer who raped, murdered 11-year-old set to be executed

An execution date has been set for a former Mascotte police officer who, in May 1987, assaulted and murdered an 11-year-old girl.  Gov. Ron DeSantis signed a death warrant for James Aren Duckett on Friday. He’s scheduled to be executed on March 31. It’ll be the state’s 5th execution this year, following a record 19 executions in 2025.  Duckett was convicted in the murder of 11-year-old Teresa McAbee about a year after her death. According to officials, Duckett took the 11-year-old to a lake, where he sexually battered, strangled and drowned her. 

Florida executes Billy Kearse

Florida executes man who killed Fort Pierce police officer during 1991 traffic stop Moments before receiving a lethal injection, Billy Kearse asked for forgiveness from the family of Danny Parrish, whose widow said she found peace after a "long, long 35 years.” A man convicted of fatally shooting a police officer with his own service weapon during a traffic stop was executed Tuesday evening, becoming the third person put to death by Florida this year after a record 19 executions in 2025.

Chinese courts conclude trials of 2 criminal gangs from northern Myanmar, 16 sentenced to death

Chinese courts have concluded the trials of 2 major criminal groups based in northern Myanmar involved in telecom and online fraud, the Supreme People's Court (SPC) said Thursday.  At a press conference held by the SPC, it was revealed that by the end of 2025, courts across the country had concluded first-instance trials of over 27,000 cases related to telecom fraud operations in northern Myanmar, with more than 41,000 returned suspects sentenced.  Notably, among the trials of the so-called "4 major families" criminal gangs -- which had drawn widespread domestic and international attention -- those of the Ming and Bai groups have completed all judicial proceedings.

Florida | Governor DeSantis signs death warrant in 2008 murder case

TALLAHASSEE, Fla. — Governor Ron DeSantis has signed a death warrant for Michael L. King, setting an execution date of March 17, 2026, at 6 p.m. King was convicted and sentenced to death for the 2008 kidnapping, sexual battery and murder of Denise Amber Lee, a 21-year-old North Port mother. On January 17, 2008, Michael Lee King abducted 21-year-old Denise Amber Lee from her North Port home by forcing her into his green Chevrolet Camaro. He drove her around while she was bound, including to his cousin's house to borrow tools like a shovel.  King took her to his home, where he sexually battered her, then placed her in the backseat of his car. Later that evening, he drove to a remote area, shot her in the face, and buried her nude body in a shallow grave. Her remains were discovered two days later. During the crime, multiple 9-1-1 calls were made, but communication breakdowns between emergency dispatch centers delayed the response.  The case drew national attention and prompted w...

Oklahoma Ends Indefinite Death Row Solitary Confinement

Every year, thousands of prisoners in the U.S. are placed in solitary confinement, where they endure isolation, abuse, and mental suffering . This practice might soon become rarer for some inmates in Oklahoma, thanks to the efforts of activists in the state. Earlier this month, the American Civil Liberties Union (ACLU) of Oklahoma announced that the Oklahoma State Penitentiary in McAlester had ended the practice of indefinite solitary confinement for "the vast majority" of death row prisoners.

‘Come on with it’: Arkansas inmate asks to hasten execution

A Faulkner County judge has scheduled an August hearing to determine whether a death row inmate can bypass his attorney’s advice, drop his remaining appeals, and hasten his execution.  Scotty Ray Gardner, 65, is facing the death penalty for the 2016 killing of his girlfriend, Susan Heather Stubbs, in Conway.  In letters sent to Circuit Judge Chuck Clawson and the Arkansas Democrat-Gazette, Gardner said he wants to end his legal battles, writing that he is tired of prison life and skeptical he will receive a fair hearing.  “It’s simple,” Gardner wrote in a September letter. “Come on with it.” 

Florida Cop-killer Billy Kearse set to be executed today

A man who confessed to fatally shooting Fort Pierce Police Officer Danny Parrish with his own service weapon during a 1991 traffic stop is scheduled to be executed starting at 6 p.m. March 3, barring a last-minute stay. Billy L. Kearse, 53, will be the third person put to death by the state this year, just one week after the execution of Melvin Trotter, who was convicted of first-degree murder and sentenced to death for strangling and stabbing Virgie Langford in Palmetto in 1986. The Florida Supreme Court on Feb. 12 denied a motion for a stay of execution and a motion for an extension due to the fading health and death of the father of Kearse's attorney. Attorneys for Kearse have filed a motion with the U.S. Supreme Court to stop the execution, citing violations of the Sixth, Eighth and 14th Amendments of the United States Constitution.

Man convicted in 1986 murder set to become Florida's second execution of 2026

STARKE, Fla. (DPN) — A man convicted of stabbing and strangling a grocery store owner during a robbery nearly 40 years ago is scheduled to die by lethal injection Tuesday evening, becoming the second person executed in Florida this year. Melvin Trotter, 65, is set to receive a three-drug lethal injection beginning at 6 p.m. at Florida State Prison near Starke. Trotter was convicted of first-degree murder in the 1986 killing of Virgie Langford, 70, who owned Langford’s Grocery Store in Palmetto, in southwest Florida's Manatee County.

Florida executes Melvin Trotter

The execution of Melvin Trotter for the murder of 70-year-old Virgie Langford in 1986 comes as Supreme Court Justice Sonia Sotomayor questions Florida's 'deeply troubling' lethal injection record. Florida has executed its second inmate of the year even as a Supreme Court justice questioned the state's “deeply troubling" record on lethal injections and how it "shrouds its executions in secrecy."  Melvin Trotter, 65, was executed by lethal injection on Tuesday, Feb. 24, for the 1986 murder of 70-year-old Virgie Langford, a mother of 4 who was on the verge of retirement when she was stabbed to death in the corner grocery store that she owned for five decades. Trotter was pronounced dead at 6:15 p.m. ET. 

Texas Plans Second Execution of the Year

Cedric Ricks is set to be killed on March 11 Cedric Ricks spoke in his own defense at his 2013 murder trial, something most defendants accused of a terrible crime do not do. Ricks confessed that he had killed his girlfriend, Roxann Sanchez, and her 8-year-old son. He admitted he was aggressive and had trouble controlling his anger, stating that he was “sorry about everything.” The Tarrant County jury was unmoved. Ricks has spent the last 13 years on death row and is scheduled to be executed on March 11.