The case against a former Massachusetts police officer accused of killing a pregnant woman who he allegedly sexually abused as a teen is set to go to trial next week. According to federal prosecutors, ex-Stoughton officer Matthew Farwell killed Sandra Birchmore to keep her quiet about his alleged sexual exploitation of her when she was a minor. He is accused of using his position as a police officer to groom and sexually abuse Birchmore since she was 15 years old. Prosecutors have argued Farwell, now 40, strangled her to death in her Canton apartment in February 2021, and s...