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)

South Carolina executes Mikal Mahdi

Mikal Mahdi, 42, was executed for the 2004 murder of 56-year-old James Myers A man facing the death penalty for committing two murders was executed by firing squad on Friday, the second such execution in the US state of South Carolina this year. Mikal Mahdi, 42, was executed for the 2004 murder of 56-year-old James Myers, an off-duty police officer, and the murder of a convenience store employee three days earlier. According to a statement from the prison, "the execution was performed by a three-person firing squad at 6:01 pm (2201 GMT)," with Mahdi pronounced dead four minutes later.

Afghanistan | Four men publicly executed by Taliban with relatives of victims shooting them 'six or seven times' at sport stadium

Four men have been publicly executed by the Taliban, with relatives of their victims shooting them several times in front of spectators at a sport stadium. Two men were shot around six to seven times by a male relative of the victims in front of spectators in Qala-i-Naw, the centre of Afghanistan's Badghis province, witnesses told an AFP journalist in the city.  The men had been 'sentenced to retaliatory punishment' for shooting other men, after their cases were 'examined very precisely and repeatedly', the statement said.  'The families of the victims were offered amnesty and peace but they refused.'

USA | Why the firing squad may be making a comeback

South Carolina plans to execute Mikal Mahdi on Friday for the murder of a police officer, draping a hood over his head and firing three bullets into his heart. The choice to die by firing squad – rather than lethal injection or the electric chair – was Mahdi’s own, his attorney said last month: “Faced with barbaric and inhumane choices, Mikal Mahdi has chosen the lesser of three evils.” If it proceeds, Mahdi’s execution would be the latest in a recent string of events that have put the spotlight on the firing squad as a handful of US death penalty states explore alternatives to lethal injection, by far the nation’s dominant execution method.

I spent 16 years in solitary in South Carolina. This is what it did to me. | Opinion

South Carolinian Randy Poindexter writes about the effects 16 years of solitary confinement had on him ahead of South Carolina’s planned execution of Mikal Mahdi , who spent months in solitary as a young man. For 16 years, I lived in a concrete cell. Twenty-three hours a day, every day, for more than 3,000 days, South Carolina kept me in solitary confinement. I was a young man before I was sent to solitary — angry, untreated and unwell. I made mistakes. But I wasn’t sentenced to madness. That’s what solitary did to me. My mental health worsened with each passing day. At first, paranoia and depression set in. Then, hallucinations and self-mutilation. I talked to people who weren’t there. I cut myself to feel something besides despair. I could do nothing as four of my friends and fellow prisoners took their own lives rather than endure another day of torturous isolation.

Florida executes Michael Tanzi

Florida on Tuesday executed a death row inmate described by one local detective as a "fledgling serial killer" for the murder of a beloved Miami Herald employee. Florida executed Michael Tanzi on Tuesday, 25 years after the murder of beloved Miami Herald employee Janet Acosta, who was attacked in broad daylight on her lunch break in 2000.   Michael Tanzi, 48, was executed by lethal injection at the Florida State Prison in Raiford and pronounced dead at 6:12 p.m. ET. 

South Carolina | Man who ambushed off-duty cop to face firing squad in second execution of its kind

Mikal Mahdi, 48, who was found guilty of killing an off-duty police officer and a convenience store worker, is the second inmate scheduled to executed by South Carolina's new firing squad A murderer who ambushed and shot an off duty police officer eight times before burning his body in a killing spree is set to become the second person to die by firing squad. South Carolina's highest court has rejected the last major appeal from Mikal Mahdi, 41, who is to be put to death with three bullets to the heart at 6pm on April 11 at the Broad River Correctional Institution in Columbia. Mahdi's lawyers said his original lawyers put on a shallow case trying to spare his life that didn't call on relatives, teachers or people who knew him and ignored the impact of weeks spent in solitary confinement in prison as a teen.

Louisiana | Lawyers of Jessie Hoffman speak about their final moments before execution

As Louisiana prepared its first execution in 15 years, a team of lawyers from Loyola Law were working to save Jessie Hoffman’s life. “I was a young lawyer three years out of law school, and Jessie was almost finished with his appeals at that time, and my boss told me we needed to file something for Jessie because he’s in danger of being executed,” Kappel said. Kappel and her boss came up with a civil lawsuit to file that said since they wouldn’t give him a protocol for his execution, he was being deprived of due process, and the lawsuit was in the legal process for the next 10 years.

Lethal Injection, Electric Chair, or Firing Squad? An Inhumane Decision for Death Row Prisoners

South Carolina resumed executions with the firing squad killing of Brad Sigmon last month. Mikal Madhi’s execution date is days away. The curtain shrieked as it was yanked open to reveal a 67-year-old man tied to a chair. His arms were pulled uncomfortably behind his back. The red bull’s-eye target on his chest rose and fell as he desperately attempted to still his breathing. The man, Brad Sigmon, smiled at his attorney, Bo King, seated in the front row before guards placed a black bag over his head. King said Sigmon appeared to be trying his best to put on a brave face for those who had come to bear witness.

Arizona | The cruelty of isolation: There’s nothing ‘humane’ about how we treat the condemned

On March 19, I served as a witness to the execution of a man named Aaron Gunches, Arizona’s first since 2022. During his time on death row, he begged for death and was ultimately granted what is likely more appropriately described as an emotionless state-assisted suicide. This experience has profoundly impacted me, leading to deep reflection on the nature of death, humanity, and the role we play in our final moments. When someone is in the end stages of life, we talk about hospice care, comfort, care, easing suffering and humane death. We strive for a “good death” — a peaceful transition. I’ve seen good ones, and I’ve seen bad, unplanned ones. 

Execution date set for prisoner transferred to Oklahoma to face death penalty

An inmate who was transferred to Oklahoma last month to face the death penalty now has an execution date. George John Hanson, also known as John Fitzgerald Hanson, is scheduled to die on June 12 for the 1999 murder of 77-year-old Mary Bowles.  The Oklahoma Court of Criminal Appeals on Tuesday set the execution date. The state’s Pardon and Parole Board has a tentative date of May 7 for Hanson’s clemency hearing, executive director Tom Bates said.