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Federal Grand Jury Adds Charge Against Ex-Stoughton Detective in Death of Sandra Birchmore’s Unborn Child

Prosecutors say Matthew Farwell killed Birchmore to stop disclosure of years of sexual abuse, with a decision on seeking the death penalty due Jan. 20.

Overview

  • A superseding indictment filed Oct. 28 charges Farwell with causing the death of Birchmore’s unborn son, estimated at 8 to 10 weeks’ gestation.
  • The original federal count accusing Farwell of killing a witness remains, alleging he strangled Birchmore in 2021 and staged her death as a suicide.
  • Farwell has pleaded not guilty, is being held without bail, and is scheduled to stand trial on Oct. 5, 2026 in federal court in Boston.
  • The new count alleges a violation of the federal protection of unborn children law, which can carry the same penalties as murder under federal statutes.
  • Previous reporting on DNA testing indicated Farwell is not the fetus’s father, and authorities have not publicly identified paternity.