Killing of Sandra Birchmore

On February 4, 2021, 23-year-old woman Sandra Birchmore (May 13, 1997 – February 1, 2021)^[2] was found dead in her Canton, Massachusetts apartment. Her death was initially ruled as a suicide by asphyxia. Federal authorities later determined that her death was a homicide, with a local police officer alleged to have killed her.^[3][4]

Birchmore's murder has drawn parallels to the death of John O'Keefe, another high-profile investigation in Norfolk County. Both cases involve allegations of law enforcement misconduct and have raised questions about the integrity of local authorities.^[5][6]

Birchmore was born and raised in Stoughton, Massachusetts by a chronically ill single mother. At age 12, Birchmore enrolled in the Stoughton Police Explorers program for youths interested in law enforcement careers.^[7] There, she met 25-year-old officer Matthew Farwell, who began grooming her and spending time with her outside of the program.^[8] In 2013, when Birchmore was 15 and Farwell was 27, federal prosecutors allege the two had sex for the first time; although Farwell married his wife just one month later, his relationship with Birchmore would continue for nearly a decade, including while he was on duty.^[4][9] In 2016, Birchmore's mother passed away of a stroke. In December 2020, Birchmore learned that she was pregnant, believing that Farwell was the father. In June 2025, a paternity test revealed that Farwell was not the father of Birchmore's unborn child. ^[10][11]

At the time of her death, Birchmore lived in Canton and worked as a teacher's assistant at an elementary school in Sharon, and had begun taking nursing courses at Massasoit Community College.^[7]

On February 4, 2021, Birchmore's colleagues at Sharon Public Schools alerted the police after she missed days of work. Police found her body in her apartment that day. First responders believe she had been dead for days. Surveillance videos from February 1 show Birchmore walking in and out of the apartment in the afternoon and Farwell walking into the building in the evening and leaving after about 30 minutes. When she was discovered, she was wearing the same clothes she wore on February 1.^{[12]: pt. 2}

In 2022, Norfolk County District Attorney Michael Morrissey's Office released a statement saying the investigation "found no evidence of foul play" in Birchmore's death. Her death was initially ruled as a suicide by asphyxia.^[13]

Birchmore's family has questioned the official ruling, saying she was not suicidal at the time of her death.^[13] They filed a wrongful death lawsuit naming Matthew Farwell, his twin brother William Farwell, and their supervisor Robert Devine. They believe all three men were involved in sexually assaulting her when she was in the explorer program, and accused the Town of Stoughton and its Police Department of negligent hiring and supervision, which caused Birchmore emotional distress.^[9][14]

In 2024, federal investigation determined that her death was a homicide, alleging that Matthew Farwell strangled her to death and staged it as a suicide to cover up their relationship and her pregnancy.^[3][4] Farwell was federally indicted on charges of murder in August 2024.

• USA v. Matthew Farwell – Detention Affidavit. United States Department of Justice. August 28, 2024. (Affidavit of Special Agent Chenee Castruita in Support of Government's Motion for Detention). Archived from the original on February 15, 2025.

• United States v. Matthew Farwell, statement of case via DocumentCloud