BOSTON — A jury in Boston is set to decide the fate of a disgraced ex-cop accused of killing Sandra Birchmore — who was allegedly groomed by police officers, sexually abused from the age of 15 and then murdered when she got pregnant.

The trial against ex-Stoughton Detective Matthew Farwell is wrapping up, with prosecutors and his defense lawyer slated to begin closing arguments Friday morning, following nearly four weeks of harrowing testimony.

Both sides have been allotted an hour and a half for closings, with jurors expected to begin deliberations after, according to a report by the Boston Globe.

At the trial, the jury heard dueling accounts of the 23-year-old pregnant woman’s Feb. 1, 2021, death.

Prosecutors claimed Farwell, a 41-year-old married father, killed Birchmore and staged it to look like a suicide to keep her quiet about her pregnancy, their affair and his years of sexually abusing her starting when she was 15.

Meanwhile, Farwell’s defense claimed Birchmore killed herself just after he went to her Canton apartment to break up with her.

Farwell did not testify but his lawyers called 12 of the 50 witnesses that jurors heard from, including a former medical examiner who claimed Birchmore’s injuries signaled a suicide rather than a homicide.

This same question — suicide or homicide — has dogged the case from the outset, with Birchmore’s death initially deemed a suicide.

Controversial Norfolk County District Attorney Michael Morrissey, who was also responsible for the prosecutions of Karen Read, declined to bring charges.

The feds eventually launched their own probe, leading to Farwell’s arrest more than three years later.

Farwell met Birchmore when she was an aspiring cop in a youth police program he helped run. He began grooming the troubled teen and eventually started a sexual relationship with her when she was 15, according to prosecutors.

The legal age of consent in Massachusetts is 16.

Years later, when Birchmore was an adult, she became jealous when she found out Farwell’s wife was pregnant with his third child. So Birchmore demanded Farwell have a baby with her or she would expose him about their relationship, prosecutors claimed.

Farwell reluctantly agreed. But when Birchmore became pregnant and whispers of their relationship started to get out, Farwell decided to kill her — the day before his wife gave birth, prosecutors argued.

While Birchmore and Farwell both believed he was the father of her baby, DNA testing after the fact revealed he was not.

The real father was a married military recruiter, who was having an affair with Birchmore.

The prosecution called 38 witnesses, including forensic and medical experts, law enforcement agents and first responders, plus Birchmore’s colleagues and friends — who testified she was excited to have a son and didn’t seem suicidal.

Prosecutors also called Farwell’s twin brother, William “Billy” Farwell, who gave damning testimony, suggesting a cover-up by Matthew, a compromised police investigation and a contradicting story about Birchmore’s mental state from what the defense argued.

Billy was given immunity for having sex with Birchmore on the job in exchange for his testimony.

Billy, who was also a cop at the time, told the jury he had sex with Birchmore when she was an adult and described her as seeming happy with no indication she planned to hurt herself leading up to her death, according to a report by WBUR.

He also testified that Matthew told him he’d wiped his cell phone after Birchmore’s death and told the jury that other cops conducted a cursory probe into the twins’ connection to her, according to the Boston Herald.

Both Billy and Matthew resigned amid an internal investigation into their relationships with Birchmore.

Farwell has pleaded not guilty to killing a victim or witness and killing an unborn baby.

If you or someone you know is affected by any of the issues raised in this story, call the National Suicide Prevention Lifeline at 800-273-TALK (8255) or text Crisis Text Line at 741741.

If you are struggling with suicidal thoughts, you can dial the 24/7 National Suicide Prevention hotline at 988 or go to SuicidePreventionLifeline.org.