A former Massachusetts police detective has been convicted of murdering a pregnant woman to keep her from revealing he had sexually abused her when she was 15. Matthew Farwell was convicted Tuesday of strangling Birchmore in 2021 and staging the crime scene to make her death look like a suicide. An initial police investigation concluded Birchmore killed herself. The FBI began looking into the case two years later and concluded it was a homicide. Farwell’s lawyers acknowledged the married detective had an affair with Birchmore, but say it began when she was old enough to consent and that he did not kill her.