At 9:27 PM on February 1, 2021, Matthew Farwell entered Sandra Birchmore's apartment building. At 9:56 PM, he left. Twenty-nine minutes. Sandra was never seen alive again. She was found three days later wearing the same clothes. Her phone recorded its final movements while Farwell was still inside. Federal prosecutors allege that in those twenty-nine minutes, the former Stoughton police detective strangled Sandra and her unborn son, then staged the scene. The forensic evidence prosecutors have assembled goes directly at Farwell. His DNA was found on the duffel bag strap they say was used to strangle her. His sperm cells were found in her underwear — contradicting his claim that he had not been intimate with her in months. Sandra's right clavicle showed an injury that occurred while she was alive, matching the buckle behind her head — evidence prosecutors say proves she could not have died in the position she was found. A broken pink flamingo necklace Sandra regularly wore was discovered tangled with her hair on the bedroom floor. Then there is the reenactment. At a private gathering after Sandra's death, an inebriated Farwell reportedly demonstrated how she supposedly died, positioning himself beneath a doorknob. The details he described had not been publicly revealed. He knew, prosecutors allege, because he staged the scene himself. But this case did not start on February 1. It started eleven days earlier — on January 20, when Sandra's friend called the Stoughton Police Department to report Farwell's relationship with Sandra. The department employee who took that call told Farwell. The institution that should have protected Sandra hand-delivered the warning to the man prosecutors say killed her. Sandra had been making plans. She believed Farwell was coming around — he brought ginger ale to her apartment, and she texted a friend that things were getting better. She had contacted lawyers. Prosecutors say she was developing a plan for child support and was prepared to disclose that Farwell had been involved with her since she was underage. For a married detective whose wife was also pregnant, Sandra had become an existential threat to everything he had built. According to prosecutors, Farwell told one person that if Sandra did not end the pregnancy, he would "take care of the problem himself." He told another he needed to "put crazy back in the bag." He told a third that "the problem was going to take care of itself." Three different people. Three different conversations. All allegedly pointing toward a man who viewed a pregnant woman as a problem to be eliminated. DNA testing confirmed Farwell was not the biological father of Sandra's unborn son. But both he and Sandra believed he was — and prosecutors say that belief is what drove him to act. For years, her death was ruled something other than homicide. The evidence says otherwise. Farwell has pled not guilty. His defense maintains Sandra took her own life. Join Our SubStack For AD-FREE ADVANCE EPISODES & EXTRAS!: https://hiddenkillers.substack.com/ Want to comment and watch this podcast as a video? Check out our YouTube Channel. https://www.youtube.com/channel/UC8-vxmbhTxxG10sO1izODJg?sub_confirmation=1 Instagram https://www.instagram.com/hiddenkillerspod/ Facebook https://www.facebook.com/hiddenkillerspod/ Tik-Tok https://www.tiktok.com/@hiddenkillerspod X Twitter https://x.com/TrueCrimePod This publication contains commentary and opinion based on publicly available information. All individuals are presumed innocent until proven guilty in a court of law. Nothing published here should be taken as a statement of fact, health or legal advice. #SandraBirchmore #MatthewFarwell #JusticeForSandra #StoughtonPolice #HiddenKillers #TrueCrime #FederalCase #DNAEvidence #ForensicEvidence #TrueCrimePodcast