PLYMOUTH — Jury selection began on Monday in the murder trial of Lindsay Clancy, who is charged with killing her three children in Duxbury, Massachusetts, in January 2023.

She has pleaded not guilty to murder charges. The killings occurred on January 24, 2023, at the family home on Summer Street. She strangled her children, Cora, 5, Dawson, 3, and Callan, 8 months, using exercise bands.

Cora and Dawson were pronounced dead on the evening of January 24, 2023. Callan died three days later at Boston Children’s Hospital. She jumped from a second-story window in a suicide attempt after the killings and was paralyzed from the waist down. She is being held at Tewksbury State Hospital.

The trial is taking place in Plymouth, Massachusetts. Eighteen jurors, including six alternates, are expected to be selected. The trial is expected to last several weeks.

Defense attorney Kevin Reddington plans to raise an insanity defense, arguing she was not criminally responsible due to mental illness. Prosecutors allege the killings were intentional and well planned.

Prosecutors allege she asked her husband, Patrick Clancy, to leave the home to get takeout food and pick up items from a pharmacy on the day of the killings. Prosecutors allege she used Apple Maps to determine how long he would be gone. Clancy told police the house was unusually quiet when he returned home.

Clancy told police he found blood in the bedroom and the second-story window open. He found her on the ground outside the house and the children unresponsive in the basement upon returning home.

"What did you do?" she asked his wife on the 911 call, according to Plymouth County Assistant District Attorney Jennifer Sprague. She told her husband on the 911 call that she tried to kill herself, according to prosecutors.

"Where are the kids?" she asked on the 911 call, according to prosecutors. She responded "In the basement" on the 911 call, according to prosecutors.

Judge William F. Sullivan ruled that jurors will hear the 911 call and tour the Clancys' former home. On Monday at 9:30 a.m., the prosecution argued a motion to exclude expert witnesses. The judge allowed the motion to exclude expert witnesses for now, stating it was premature and could be renewed. Sullivan denied the defense's request to call other women who have experienced postpartum depression to testify.

Prosecutors dropped three strangulation charges against her earlier in July 2026. Prosecutors allege she made an internet search for "can you treat a sociopath?" shortly before January 24, 2023. Prosecutors allege she wrote a journal entry about resenting her two oldest children and wanting to feel love and connection with all of her kids.

She and her husband filed lawsuits earlier in 2026 accusing medical providers of failing to properly diagnose and treat her for a severe postpartum psychiatric condition. The lawsuit filed by her states she heard voices urging her to harm her children and herself. According to the lawsuit, she heard voices saying, "This is your last chance. Kill the children so you can kill yourself."

She did everything a mother in her situation could do, the lawsuit said. "She recognized something was wrong with her. She sought medical treatment."

She went to emergency rooms. She called crisis hotlines. She admitted herself to hospitals. She took the medication prescribed to her. She communicated her worsening symptoms to her providers. She told them the medications were making her worse.""

"I lost all control. My body started acting without any control on my part," she wrote in a malpractice lawsuit. "I was just following commands, ‘all action.’ This voice demanded action."

she stated in interviews that he forgives his wife. He wrote in a GoFundMe post that the shock and pain is excruciating and relentless, but urged the public to see his wife as he did before the killings. The real Lindsay was generously loving and caring toward everyone — me, our kids, family, friends, and her patients.

The very fibers of her soul are loving. All I wish for her now is that she can somehow find peace," he wrote."

More than 200 potential witnesses have been identified by prosecutors and defense attorneys. Other prospective witnesses for the prosecution include Massachusetts State Police troopers, Duxbury police officers, firefighters, local doctors, medical examiners, and friends and family members. Other prospective witnesses for the defense include family members, friends, doctors, and the Clancy family's nanny.