Matthew Farwell, a former Stoughton police officer, is seeking to move his trial to Rhode Island.
Farwell was arrested and indicted on a federal charge of killing a witness or victim in August 2024 in the 2021 death of Birchmore when she was 23.
A superseding indictment filed in October revealed that Farwell has additionally been charged with violation of the protection of an unborn child.
Prosecutors have accused Farwell of murdering Birchmore after she informed him he was the father of her unborn child. He was also a married father of three at the time.
Birchmore was found dead at her apartment in Canton.
Farwell is accused of staging Birchmore’s death to make it look like a suicide.
