Closing arguments concluded Friday in the federal trial of Matthew Farwell, a former Massachusetts police officer accused of killing Sandra Birchmore, 23, and her unborn child in 2021. The jury is now deliberating the case, which centers on allegations that Farwell staged Birchmore’s death to look like a suicide after years of sexual abuse that began when she was 15.
Farwell, who worked for the Stoughton Police Department, has pleaded not guilty to charges including killing a witness or victim and causing the death of an unborn child. Prosecutors allege he killed Birchmore to silence her about their relationship, which they say started when she was a teenager participating in a police youth program where Farwell was an instructor. Farwell did not testify during the trial.
Key developments in the case
Prosecutors presented evidence that Birchmore was thrilled about her pregnancy and had planned for motherhood, including booking a maternity photoshoot, researching baby names, and purchasing a stroller. Text messages introduced during the trial showed Birchmore had told Farwell she wanted his child or she would reveal their affair to his wife. By late December 2020, she was pregnant, and on December 28, 2020, she sent Farwell a photo of a positive pregnancy test.
The defense did not dispute the existence of the affair but argued that prosecutors failed to prove Farwell killed Birchmore. Farwell’s attorneys claimed Birchmore’s manner of death—initially ruled a suicide by local authorities—was misclassified and that there was no evidence linking Farwell to her death.
Background and investigation timeline
Birchmore was found dead in her apartment in February 2021, with a strap around her neck. Local police and the Massachusetts State Police initially ruled her death a suicide, though the state’s medical examiner later changed the cause to undetermined. A federal investigation led to Farwell’s indictment in 2024 on charges of killing a witness or victim, followed by a 2025 indictment for causing the death of an unborn child.
Prosecutors allege Farwell’s motive was to prevent Birchmore from exposing their relationship, which they say began when she was 15 and he was 27. The relationship continued for years, including during Birchmore’s participation in the police youth program. Farwell was a detective at the time of Birchmore’s death and had two children with his wife.
Trial proceedings and defense arguments
During the trial in U.S. District Court in Boston, prosecutors argued that Farwell’s actions were premeditated, pointing to Birchmore’s pregnancy and her ultimatum to him as potential triggers for violence. The defense, however, emphasized inconsistencies in the prosecution’s timeline and the lack of forensic evidence directly linking Farwell to the scene.
Farwell’s attorneys also contested the credibility of witness testimonies, including those from Birchmore’s friends and family, who described her as excited about becoming a mother. The defense suggested alternative explanations for her death, though they did not present a specific theory during closing arguments.
Broader implications and public reaction
The case has drawn significant attention due to the alleged abuse of power by a law enforcement officer and the systemic failures in Birchmore’s case. Local authorities’ initial ruling of suicide has been widely criticized, with Birchmore’s family and advocates arguing that her death was mishandled from the outset. The FBI’s involvement in the investigation underscored concerns about local law enforcement’s handling of the case.
Community groups, including Justice for Sandra Birchmore, have organized protests and vigils, calling for accountability. The trial has also reignited discussions about the accountability of police officers in cases involving sexual misconduct and the adequacy of internal oversight mechanisms.
What’s next
The jury’s deliberations are expected to continue over the coming days. If convicted, Farwell faces life imprisonment on the federal charges. The case has raised questions about the adequacy of protections for victims of abuse by authority figures and the role of law enforcement in investigating such crimes.