Dr. John Boyle: Murder, Trial, Appeals, and Collier Landry’s Story

The Dr. John Boyle murder case is the 1989 killing of Noreen Boyle by her husband, a Mansfield, Ohio osteopathic physician who suffocated her, buried her body beneath the basement floor of a house he was buying in Erie, Pennsylvania, and was convicted the following year largely on the testimony of the couple’s 11-year-old son. Boyle was sentenced to 20 years to life, denied parole three times, and died in custody on April 18, 2026, at age 82, having spent nearly 36 years in prison.¹

The Doctor and a Marriage Coming Apart

Boyle was a 1973 graduate of the University of Pennsylvania and of the Philadelphia College of Osteopathy, and had worked at a Navy clinic in Virginia before settling in Mansfield in 1983.²³ He built an osteopathic practice there and lived with his wife Noreen and their two children, 11-year-old Collier and three-year-old Elizabeth, who had been adopted.

By late 1989 the marriage was over in all but name. Noreen filed for divorce in November, and the couple was fighting over property, alimony, and custody of Elizabeth.⁴ Boyle was involved with a 26-year-old woman who was pregnant with his child. He had plans to close his Mansfield practice, move to Erie, Pennsylvania, and take a job in occupational medicine there.³

The Murder and the Basement in Erie

Noreen was killed in the early hours of December 31, 1989, in the family’s Mansfield home. Collier, asleep upstairs, was awakened at about 3:17 a.m. by what he later described as a “piercing scream and two thuds.”⁵ The next morning, Boyle told his son that his mother had gone on vacation.

An autopsy later determined that Noreen died of suffocation from a plastic bag placed over her head, combined with blunt force trauma to her skull.⁶ When her body was recovered, it was wrapped in a green tarp with a white plastic bag over her head.⁵

The concealment had been planned for weeks. On December 4, 1989, Boyle asked a realtor about what lay beneath the basement floor of the Erie home he was purchasing. On December 19, he rented an electric jackhammer. After the killing, he took Noreen’s body to the Erie property, broke through the basement’s concrete floor, and buried her. He bought indoor-outdoor carpeting on January 4, 1990, and had a shelving unit built over the site on January 8. A contractor working at the property noticed that the basement windows had been left open despite freezing temperatures outside.⁷

How Boyle Was Caught

The case turned on the son. Collier did not believe his father’s vacation story. Before her death, Noreen had given him a list of her friends’ names and phone numbers hidden inside a stuffed toy, with instructions to contact them if she ever disappeared. He followed those instructions, and the friends alerted police.⁵

The investigation was led by Mansfield police Lt. David Messmore. He later recalled that his own department was slow to move: “No one was initially interested in the investigation but me. My supervisor questioned my interest and didn’t want to embarrass a doctor.”⁸ Richland County Prosecutor James Mayer was also initially reluctant to authorize the travel to Erie needed to pursue the lead.

Collier kept feeding investigators material. He gave them photographs he had found in his father’s truck showing Boyle with a pregnant woman at a house the boy did not recognize, which pointed the team toward the Erie property. He also noticed that his father’s mistress was wearing his mother’s diamond ring.⁵ When police approached Boyle directly, his refusal to talk and the quick appearance of an attorney at the door deepened Messmore’s suspicions.⁸

On January 25, 1990, officers from Ohio and Pennsylvania executed a search warrant at the Erie home. They found a patch of soft concrete in the unfinished basement, broke through it, and recovered Noreen’s body. Allegheny County coroner Dr. Michael Sobol identified her by matching 25 teeth from the remains to her dental records, and a Rolex watch on the body was confirmed as hers.⁷ Boyle was arrested and held on a $5 million bond.²

The Trial

Boyle was indicted on aggravated murder and felony abuse of a corpse. His trial opened on June 4, 1990, in Richland County Common Pleas Court before Judge James Henson, ran four weeks, and drew overflow crowds who watched proceedings on a television set up in the courthouse lobby.³

Prosecutor James Mayer built a largely circumstantial case, tying together the jackhammer rental, the carpet purchase, the shelving unit, the open basement windows, and the broader timeline of preparations. In closing, Mayer called Boyle a “healer by day, killer by night,” a line that reportedly caused the otherwise composed defendant to sniffle and wipe away tears.⁹

The prosecution’s central witness was Collier. At 11, he testified about the scream and thuds he had heard that night and about his father’s behavior in the days afterward. Messmore later described the boy as a “miniature adult” who was “adamant” that something was wrong, and said Collier’s information proved accurate at every turn.⁵

Boyle’s attorneys, Bob Whitney and Charles Robinson, argued that Noreen was still alive. Whitney told the jury that the body from the Erie basement was not hers, pointing to a discrepancy between the weight of the remains and Noreen’s known weight, and suggested she had left in an unidentified car or been spotted at Washington Dulles International Airport by Boyle’s brother, whom the defense chose not to call.³ Boyle took the stand himself and testified for nine hours over two days, maintaining his innocence.⁹

The jury deliberated six hours and convicted him on both counts. Judge Henson imposed life imprisonment with no parole eligibility for 20 years on the murder charge, plus a consecutive 18-month term for abuse of a corpse. Boyle entered the Marion Correctional Institution on July 6, 1990. In 1995, Noreen’s body was exhumed and a DNA sample was matched to her sister’s, ending any remaining question about identity.³

Appeals and Three Parole Denials

Boyle’s appeals went nowhere. On June 2, 1994, the U.S. Court of Appeals for the Sixth Circuit affirmed the denial of his federal habeas petition, finding that although some prosecutorial misconduct had occurred, it was harmless because the evidence of guilt was “overwhelming.”¹⁰ Later attempts to reopen his sentence through jail-time-credit motions were dismissed at every level, with the Supreme Court of Ohio affirming the last dismissal on July 24, 2024.¹¹

He became parole-eligible after serving 20 years and was turned down three times, each time unanimously.

In 2010, the Ohio Parole Board denied his first request for release.
In 2020, the board again denied parole, citing the “seriousness of Offender Boyle’s crimes, marked by extreme brutality, callousness” and risk to public safety.⁴
After a hearing on August 20, 2025, a five-member panel voted 5–0 to deny parole, citing the “unique elements of the offense,” community opposition, and Boyle’s “lack of insight relative to the degree of victimization.” He would not have been eligible for another hearing until August 2030.⁶

Boyle’s Changing Story

For close to 30 years Boyle denied any role in Noreen’s death, and in 1994 he still suggested she might be alive. That changed when he sat for the 2018 documentary A Murder in Mansfield, directed by Barbara Kopple. In a prison interview for the film, he admitted killing Noreen but described it as an accident: she had come at him with a knife, he said, he pushed her, and she fell and struck her head on a wooden table. He said he then placed a plastic bag over her head because he was “scared to look at her.”⁴ He repeated the accident claim in a later podcast appearance. His son publicly rejected those accounts.⁵

Collier Landry After the Case

Both Boyle children were removed from their father’s care after the arrest. Collier stayed briefly with Detective Messmore and his wife, who wanted to adopt him, but juvenile court judge Paul Christ denied the placement, ruling it inappropriate to place the boy with the officer who had arrested his father.⁸ Collier moved through foster homes and was eventually adopted by a Mansfield couple. Elizabeth went to a different family, and Collier later said he had not seen her since.⁵

As an adult he dropped the Boyle name and legally became Collier Landry, using his middle name. He works as a cinematographer in Los Angeles and has become an advocate for survivors of violent crime. He collaborated with Kopple on A Murder in Mansfield, which premiered at DOC NYC in 2017 and aired on Investigation Discovery on November 17, 2018.¹² He also hosts a podcast, Moving Past Murder, on which he has read from the roughly 500 letters his father sent him from prison, describing them as showing his father’s manipulative nature.¹³

Death in Custody

David Messmore, the retired Mansfield police captain who led the investigation, died on January 11, 2026, at 82.⁸ Three months later, on April 17, 2026, Boyle was transferred from the Marion Correctional Institution to a medical facility in Columbus, where he was removed from a ventilator pursuant to a Do Not Resuscitate order. He died the next morning, April 18, 2026, at 7:57 a.m., at age 82.¹⁴ His status with the Ohio Department of Rehabilitation and Correction was updated to “Released – Death.”¹⁵ He had served nearly 36 years and never won release.

1
Richland Source. Sentence Complete: Convicted Murderer John Boyle Dies Behind Bars
2
UPI Archives. Doctor Held on $5 Million Bond in Death of Wife
3
Mansfield News Journal. Dr. John Boyle Murder Case, Years Later
4
Richland Source. No Release: Former Mansfield Dr. John Boyle Again Denied Parole
5
CNN. John Boyle Murder: Collier Landry
6
WMFD. John Boyle Jr. Denied Parole in Parole Board Hearing
7
Westlaw. Boyle v. Brigano, 25 F.3d 1047
8
Richland Source. David Messmore Never Had to See John Boyle Released From Prison
9
GoErie. From the GoErie Archive: Dr. John Boyle
10
Resource.org. Boyle v. Brigano, 25 F.3d 1047
11
Supreme Court of Ohio. State ex rel. Boyle v. Chambers-Smith, 2024-Ohio-2777
12
Esquire. Collier Landry: A Murder in Mansfield Interview
13
The Guardian. True Crime Survivor Podcast
14
WMFD. Mansfield Convicted Murderer Dr. John Boyle Confirmed Deceased
15
Ohio DRC. Offender Search: John F. Boyle Jr.