Ex-Officer Matthew Farwell Convicted of Murdering Pregnant Sandra Birchmore

A federal jury in Boston on Tuesday convicted former Stoughton police detective Matthew Farwell of murdering Sandra Birchmore, 23, who was about eight weeks pregnant when she died in February 2021. The verdict ends a case that began as a ruled suicide and was reopened by the FBI.

Farwell, 40, was found guilty on both counts: killing a witness or victim, and causing the death of an unborn child. He faces a mandatory life sentence, with sentencing on February 3, 2027, before Chief Judge Denise J. Casper. The jury of eight men and four women deliberated roughly 14 to 15 hours over three days, said on Monday they were deadlocked, and returned a unanimous verdict on Tuesday.

Key Points

• A Boston federal jury convicted former Stoughton detective Matthew Farwell, 40, of killing Sandra Birchmore, 23, and her unborn baby. He faces mandatory life; sentencing is February 3, 2027.
• Prosecutors said Farwell strangled Birchmore on February 1, 2021, in her Canton apartment and staged a suicide by hanging, to stop her revealing abuse that began when she was 15.
• Birchmore was about eight weeks pregnant with a baby boy, and had met Farwell in the Stoughton Police youth explorers programme.
• The jury deliberated roughly 14 to 15 hours over three days, reported on Monday they were deadlocked, and returned a unanimous verdict on Tuesday.
• The trial heard about 50 witnesses and 500 exhibits, and the FBI found about 40,000 texts between them. Her death was first ruled a suicide; the FBI concluded in 2023 it was a homicide.

What Happened

The verdict arrived on Tuesday, November 10, 2026, after a trial that opened on October 9 and ran for nearly four weeks in federal court in Boston. Jurors heard about 50 witnesses and saw 500 exhibits, including roughly 40,000 texts between Farwell and Birchmore. Farwell pleaded not guilty and declined to testify. Deliberations began on Friday, November 6. On Monday they told Judge Casper they were deadlocked, and she ordered them to continue. On Tuesday they returned a unanimous guilty verdict on both counts.

Farwell has been in custody since his arrest and charging in August 2024, and he will remain there until he is sentenced in February. The Justice Department said in December 2025 that it would not seek the death penalty, so the February hearing will decide the terms of a life sentence.

Background and Context

Birchmore was found dead on February 1, 2021, in her Canton, Massachusetts, apartment, with a strap around her neck. Massachusetts State Police investigators and the medical examiner first ruled her death a suicide, and no local charges were ever filed. Doubts grew, and the medical examiner later changed the manner of death to "undetermined". It was not until 2023 that the FBI began looking into the case, concluding it was a homicide.

Prosecutors told the jury the relationship began when Birchmore was 15 and taking part in the Stoughton Police Explorers youth programme, where Farwell was one of the officers working with the young participants. They said he began sexually abusing her then, and the abuse continued for years as he used his position to keep her silent. By early 2021, they said, she was pregnant with what she believed was his child and was preparing to tell others. Prosecutors said he strangled her and staged a hanging, so the abuse that began when she was a child would never come out. The defence said she died by suicide and there was no proof she was about to report him.

Matthew Farwell Convicted: How the Jury Reached Its Verdict

The Matthew Farwell convicted verdict turned on two questions: what happened in Birchmore's apartment on February 1, 2021, and why. Prosecutors presented expert testimony that the way her body was found did not fit with a person taking her own life. They paired it with the relationship, arguing the abuse, the pregnancy and the looming disclosure gave Farwell a clear motive.

Prosecutors put that motive bluntly in closing, telling jurors Farwell killed Birchmore to "clean up his mess" after abuse that began when she was 15. The defence countered that the government had not proved its case and the evidence was open to more than one reading. The deadlock note showed the jury was struggling, but the unanimous verdict means all twelve jurors agreed on both counts, rejecting the defence account of suicide.

Reactions and Quotes

US Attorney Leah B. Foley welcomed the verdict, saying: "Today, justice was served for Ms. Sandra Birchmore and her unborn son, both of whom died at the hands of Matthew Farwell." The defence maintained throughout that Birchmore died by suicide and the prosecution had not proved otherwise.

Why It Matters

The verdict matters well beyond the fate of one former detective. It tests whether the justice system can hold a police officer accountable for abusing a child who trusted him through a youth programme run by his own department, and whether a death first written off as suicide can be re-examined. It also exposes the gaps when the first investigation gets it wrong: state police called it a suicide, no local charges were filed, and only a changed medical finding, a 2023 FBI inquiry and a federal indictment in August 2024 brought the case to trial. For youth programmes like the Police Explorers, which depend on the trust of teenagers and their families, the conviction sends a message that the badge does not shield an officer who abuses that trust.

What Happens Next

Farwell will be sentenced on February 3, 2027, by Chief Judge Denise J. Casper, and he faces a mandatory life sentence. He has been in custody since August 2024 and will remain there. His lawyers may appeal to the First Circuit Court of Appeals in Boston. For Birchmore's family, the verdict ends more than five years of waiting. The February hearing will give them the chance to address the court before the life sentence is imposed.

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Frequently Asked Questions

Who was Sandra Birchmore?
A 23-year-old from Stoughton, Massachusetts, who took part in the Stoughton Police Explorers as a teenager. She was found dead on February 1, 2021, in her Canton apartment, about eight weeks pregnant.

What was Matthew Farwell convicted of?
The 40-year-old former Stoughton detective was found guilty of killing a witness or victim and of causing the death of an unborn child.

What sentence does Farwell face?
A mandatory life sentence, to be imposed on February 3, 2027, by Chief Judge Denise J. Casper. The Justice Department will not seek the death penalty.

Why was her death first ruled a suicide?
State police and the medical examiner first called it a suicide, and no local charges were filed. The medical examiner later changed the finding to "undetermined", and the FBI concluded in 2023 it was a homicide.

What happens next in the case?
Farwell remains in custody until sentencing on February 3, 2027. His lawyers may appeal, and Birchmore's family will have the chance to address the court at sentencing.