Convicted 1972 to 1985 Serial killer profile

Marybeth Tinning

Marybeth Roe Tinning

Convicted in 1987 of the murder of her infant daughter Tami Lynne; nine of her children died between 1972 and 1985 in Schenectady, New York. Sentenced to 20 years to life, paroled in August 2018.

Also known as
Marybeth Roe Tinning
Legal status
Convicted
Active
1972 to 1985
States
New York
Cities
Schenectady, Duanesburg
Victims
1 convicted, 3 confessed, 8 of the 9 deaths suspected
Victim profile
Her own children, all under age five: eight biological children and one adopted son, who died between 1972 and 1985
Method
smothering
Apprehended
February 1986
How caught
After her ninth child died in December 1985, a state police forensic pathologist found the infant had been smothered, and Tinning gave police a written statement admitting it.
Sentence
20 years to life for second-degree murder (depraved indifference) of Tami Lynne Tinning (1987)
Fate
Released: Paroled from Taconic Correctional Facility, Bedford Hills, on August 21, 2018; lifetime parole supervision in Schenectady County
Born
September 11, 1942
Timeline to scale
Each dot is a dated event below; the distance between dots is elapsed time. The darker dot marks the first known murder.
September 11, 1942: Marybeth Roe born in Duanesburg, New York.1965: Marries Joseph Tinning.January 3, 1972: Daughter Jennifer dies at eight days old; the death is later regarded as natural.January 20, 1972: Son Joseph Jr., 2, dies.March 2, 1972: Daughter Barbara, 4, dies.December 10, 1973: Son Timothy dies at about two weeks old; attributed to SIDS.1975: Son Nathan dies at five months.1979: Daughter Mary Frances dies after cardiac arrest.March 1980: Son Jonathan dies after four weeks on life support.March 2, 1981: Adopted son Michael dies.December 20, 1985: Four-month-old Tami Lynne dies; a state police pathologist finds she was smothered.February 1986: Tinning signs a statement admitting she smothered Tami Lynne, Timothy and Nathan; she is charged only in Tami Lynne's death and freed on $100,000 bail.June 22, 1987: Trial opens in Schenectady County Court.July 17, 1987: Jury convicts her of second-degree murder (depraved indifference) in Tami Lynne's death and acquits her of intentional murder.October 1987: Sentenced to 20 years to life; enters Taconic Correctional Facility.December 1988: Appellate Division rejects her appeal over the confession and the sufficiency of the evidence.March 2007: First parole hearing; denied. Five further denials follow through January 2017.July 2018: Parole granted at her seventh hearing.August 21, 2018: Released from Taconic Correctional Facility at age 75 under lifetime parole supervision.19421972201847 years from incident to latest development
New York
12 serial killer profiles in New York. Select any state to browse its profiles.
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Marybeth Tinning is a former nursing assistant from Schenectady, New York, whose nine children all died before the age of five between 1972 and 1985. Only one of those deaths was ever adjudicated: in July 1987 a Schenectady County jury convicted her of second-degree murder in the December 1985 smothering of her four-month-old daughter, Tami Lynne. She was sentenced to 20 years to life, served more than 31 years, and was paroled in August 2018. United Press International reported at the time of the verdict that investigators suspected her in eight of the nine deaths, but she was formally charged only in Tami Lynne's case.

According to the Wikipedia article on the case, the first three deaths came within about two months in early 1972. Jennifer, born December 26, 1971, died on January 3, 1972, of what doctors recorded as meningitis and brain abscesses that developed before birth; investigators later treated that death as natural. Joseph Jr., aged two, died on January 20, 1972, and Barbara, aged four, died on March 2, 1972, after a hospital admission the previous day. Timothy died in December 1973 at about two weeks old, a death attributed to sudden infant death syndrome, and Nathan died in 1975 at five months. Mary Frances died in 1979 after cardiac arrest and brain damage, Jonathan died in March 1980 after four weeks on life support, and Michael, a boy the couple had adopted in 1978, died on March 2, 1981. CBS New York, drawing on Associated Press reporting, listed the recorded causes as meningitis, seizures, cardiac arrest, SIDS, pulmonary edema, pneumonia and, in one case, undetermined.

Tami Lynne, born August 22, 1985, died on December 20, 1985. According to the Wikipedia account, Dr. Michael Baden, a forensic pathologist working for the New York State Police, determined that she had been smothered, and the medical examiner said no suspicion had attached to the family before that death. Social services officials and Schenectady police visited the home the same day, and the Tinnings were questioned separately. In early 1986 Tinning signed a statement admitting that she had smothered Tami Lynne and had also killed her sons Timothy and Nathan. CBS New York reported that prosecutors indicted her in all three deaths but pursued only the Tami Lynne case. She was released on $100,000 bail to await trial.

The trial opened in Schenectady County Court on June 22, 1987, before Judge Clifford Harrigan, with District Attorney John Poersch prosecuting. UPI reported that the defense, led by Paul Callahan, argued that Tami Lynne could have died of natural causes, including a rare hereditary disorder, and that investigators had intimidated Tinning into confessing. Her husband, Joseph Tinning, testified that she had told him privately, "I killed Tami," while saying he still believed she was innocent. On July 17, 1987, after about 23 hours of deliberation over three days, the jury acquitted her of intentional murder but convicted her of second-degree murder on the theory of depraved indifference to human life. Bail was revoked and she was jailed pending sentence.

In October 1987 she was sentenced to 20 years to life, five years less than the maximum, and entered Taconic Correctional Facility in Bedford Hills. On appeal she argued that her confession was involuntary and that the evidence was insufficient; according to the Wikipedia article, the Appellate Division of the New York Supreme Court rejected those arguments in December 1988. The six other children's bodies that were exhumed after Tami Lynne's death showed no physical signs of abuse, and no further charges were ever brought.

Tinning first became eligible for parole in March 2007 and was denied six times. The Associated Press reported that at her second hearing, in January 2011, she began to acknowledge the killing for which she was convicted, and Oxygen quoted her telling the board that after the earlier deaths she had "just lost it" and believed her daughter would die too. Parole boards nonetheless cited superficial remorse and the senseless loss of a young life in denying release in 2009, 2011, 2013, 2015 and 2017. At her seventh hearing, in July 2018, the board granted parole. According to the Associated Press, she walked out of Taconic on Tuesday, August 21, 2018, at age 75, after more than 31 years in custody, and was placed under lifetime parole supervision in Schenectady County, where her husband said she would live with him in Duanesburg.

Born Marybeth Roe on September 11, 1942, in Duanesburg, New York, she married Joseph Tinning in 1965 and worked as a nursing assistant at Ellis Hospital in Schenectady. Commentators cited by the Associated Press and other outlets have described the case as an early example of what became known as Munchausen syndrome by proxy, and it is often credited with prompting hospitals, police and medical examiners to share information about repeated child deaths in a single family. Her 1986 admissions about Timothy and Nathan were never tested in court, and she later maintained that the statement was coerced.

filicideinfant deathsdisputed confessionparole
  1. September 11, 1942
    Marybeth Roe born in Duanesburg, New York.
  2. 1965
    Marries Joseph Tinning.
  3. January 3, 1972
    Daughter Jennifer dies at eight days old; the death is later regarded as natural.
  4. January 20, 1972
    Son Joseph Jr., 2, dies.
  5. March 2, 1972
    Daughter Barbara, 4, dies.
  6. December 10, 1973
    Son Timothy dies at about two weeks old; attributed to SIDS.
  7. 1975
    Son Nathan dies at five months.
  8. 1979
    Daughter Mary Frances dies after cardiac arrest.
  9. March 1980
    Son Jonathan dies after four weeks on life support.
  10. March 2, 1981
    Adopted son Michael dies.
  11. December 20, 1985
    Four-month-old Tami Lynne dies; a state police pathologist finds she was smothered.
  12. February 1986
    Tinning signs a statement admitting she smothered Tami Lynne, Timothy and Nathan; she is charged only in Tami Lynne's death and freed on $100,000 bail.
  13. June 22, 1987
    Trial opens in Schenectady County Court.
  14. July 17, 1987
    Jury convicts her of second-degree murder (depraved indifference) in Tami Lynne's death and acquits her of intentional murder.
  15. October 1987
    Sentenced to 20 years to life; enters Taconic Correctional Facility.
  16. December 1988
    Appellate Division rejects her appeal over the confession and the sufficiency of the evidence.
  17. March 2007
    First parole hearing; denied. Five further denials follow through January 2017.
  18. July 2018
    Parole granted at her seventh hearing.
  19. August 21, 2018
    Released from Taconic Correctional Facility at age 75 under lifetime parole supervision.

Corrections and family contact

This profile states only what courts, official bodies and the cited reporting have recorded. A court convicted this person of murder; the counts are stated in the sentence line.

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Facts last verified October 28, 2026. Page last updated November 4, 2026.

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Permalink: https://coldcaseindex.com/serial-killers/marybeth-tinning/. This entry was last updated on November 4, 2026; cite that date as the publication date. The primary sources listed above should be cited for the underlying facts.

APA
ColdCaseIndex. (2026, November 4). Marybeth Tinning. https://coldcaseindex.com/serial-killers/marybeth-tinning/
MLA
“Marybeth Tinning.” ColdCaseIndex, 4 Nov. 2026, coldcaseindex.com/serial-killers/marybeth-tinning/.
Wikipedia
{{cite web |url=https://coldcaseindex.com/serial-killers/marybeth-tinning/ |title=Marybeth Tinning |website=ColdCaseIndex |date=2026-11-04 |access-date=}}