The Stoughton cop accused of grooming Sandra Birchmore as a minor and then killing her when she was an adult will not be present at his arraignment on a new charge of killing their unborn child.

Matthew Farwell, 39, of North Easton, was originally indicted in federal court in Boston in August 2024 with killing a witness or victim in the death of Birchmore, who he had maintained a sexual relationship with for seven years. On Feb. 1, 2021, she was found dead in an apparent suicide in her Canton apartment at age 23. Federal investigators say Farwell just staged the scene to look like a suicide but had actually slayed the woman after she shared that she was pregnant.

At the end of last month, federal prosecutors took the death of the unborn baby — who Birchmore had strongly indicated she was

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