The Worst Way to Abuse Trust
When a young girl searching for guidance instead became the alleged victim of the very person she believed she could trust.
I think about Sandra Birchmore often because I see so much of my younger self in her.
I was the kid who looked up to police officers as if they were superheroes. I wanted to be noticed, encouraged, and accepted by the adults I admired.
Every child deserves mentors worthy of that trust.
As an adult, I can’t begin to imagine taking advantage of a child who looked up to me. That’s what makes Sandra’s story so heartbreaking. According to federal prosecutors, she placed her trust in adults who allegedly exploited it in the worst way imaginable.
Sandra Birchmore was just 12 years old when she joined the Stoughton Police Explorers program, a youth program designed to introduce young people to careers in law enforcement. According to federal prosecutors, it was there that she met Matthew Farwell, who would later become a Stoughton police officer and an instructor with the program.
Federal prosecutors allege that what began as a mentorship evolved into years of grooming and sexual exploitation. According to the indictment, Farwell used his authority and access as a police officer to begin sexually abusing Birchmore when she was 15 years old, and the relationship continued into adulthood. Prosecutors further allege that some of the sexual encounters occurred while Farwell was on duty as a police officer. Farwell has denied the charges and is presumed innocent unless proven guilty in court.
In late 2020, Birchmore learned she was pregnant. According to court documents, Sandra believed Matthew Farwell was the father of her unborn child. Prosecutors allege Farwell also believed he was the father, and that this belief became part of the motive for the alleged murder. Prosecutors allege that as word of their relationship began to spread and a report was made to the Stoughton Police Department, Farwell feared his years of alleged criminal conduct would be exposed. They allege that this became the motive for her murder.
On February 4, 2021, Birchmore was found dead inside her apartment in Canton, Massachusetts. Her death was initially ruled a suicide by the Massachusetts Office of the Chief Medical Examiner. Her family, however, never accepted that conclusion and continued pushing for answers, including filing a wrongful death lawsuit and obtaining an independent forensic review that challenged the original finding.
As federal investigators revisited the case, they uncovered evidence that painted a very different picture—one they say was inconsistent with suicide and instead supported a homicide investigation..
According to prosecutors, surveillance footage showed Farwell entering and later leaving Birchmore’s apartment building around the time investigators believe she was killed. They also recovered digital evidence that allegedly showed Farwell instructing Birchmore to delete communications between them.
Perhaps some of the most heartbreaking evidence came from Sandra herself.
Rather than planning to end her life, investigators say she appeared to be preparing for motherhood. According to federal court documents, Birchmore had been communicating with a photographer about scheduling newborn photos, searching online for children’s furniture, asking friends about baby clothes, purchasing baby supplies, and making future plans. Family members also found laundry in progress, unopened baby items, and a handmade pregnancy announcement inside her apartment after her death. Prosecutors argue these actions were inconsistent with someone planning to die that day.
Less than 13 hours after the alleged killing, Farwell’s wife gave birth to their third child. The timing is almost impossible to comprehend. According to prosecutors, Farwell moved between those two moments as if nothing had happened.
In August 2024, a federal grand jury indicted Farwell on one count of killing a witness or victim, alleging he strangled Birchmore and staged the scene to resemble a suicide in order to prevent law enforcement from learning about his alleged sexual exploitation of her. In October 2025, prosecutors filed a superseding indictment adding a charge alleging that Birchmore’s unborn child also died as a result of the killing. Farwell has pleaded not guilty to all charges.
The federal trial is currently scheduled to begin in October 2026. Federal prosecutors have announced they will not seek the death penalty. If convicted, Farwell faces the possibility of spending the rest of his life in prison.
For anyone looking to stay informed about the case and support Sandra's family, they have a Facebook group dedicated to support for Birchmore.
Sandra's story is a reminder that child grooming rarely begins with obvious violence. It often begins with trust, access, and an adult willing to abuse a position of authority. That's why I'm highlighting Darkness to Light, an organization dedicated to preventing child sexual abuse through education, training, and empowering adults to recognize the warning signs of grooming before abuse escalates.
Sources
U.S. Department of Justice – August 28, 2024 indictment announcement
U.S. Department of Justice – October 28, 2025 superseding indictment announcement
Federal indictment and court filings (U.S. District Court, District of Massachusetts)
FBI Boston investigation materials referenced in federal filings
NBC Boston
WBUR