Watch Live: Lindsay Clancy trial testimony resumes with doctor who treated her after Massachusetts murders

The Lindsay Clancy trial resumed Monday after a week of emotional testimony in the case of the Duxbury, Massachusetts mother who admitted to killing her three children. The day started with doctors who treated Lindsay Clancy and her children after the murders taking the stand.

Prosecutors allege that she made a calculated decision to strangle 5-year-old Cora, 3-year-old Dawson and 8-month-old Callan on Jan. 24, 2023. The defense says she was overmedicated and committed the killings during an episode of extreme postpartum psychosis.

Testimony began again Monday morning in Plymouth Superior Court. You can watch it live in the embedded video and on CBS News Boston's YouTube page when court is in session.

ER doctor who treated Lindsay Clancy says cuts were "superficial"

The jury on Monday heard for the first time from a doctor who treated Lindsay Clancy on the night of the murders. South Shore Hospital emergency medicine Dr. Kelly McDonough said she was told she'd be receiving "a patient who had fallen out the window from a height."

Legal experts say prosecutors are trying to show that Clancy's suicide attempt was faked. Dr. McDonough said the cuts on Clancy's body were not actively bleeding and did not require immediate attention.

"She had some superficial lacerations of her wrists and neck," Dr. McDonough said.

She said the focus of the treatment was dealing with Clancy's injuries from the fall. Clancy was breathing on her own but had to be intubated, and could not move her legs. 

During cross-examination, defense attorney Kevin Reddington asked what Clancy's body temperature was that night, but Dr. McDonough said she didn't remember. Reddington asked if she reviewed her notes and records before coming to trial.

"I'm sure you're very busy, but this is a murder trial, doctor," Reddington said.

Dr. McDonough replied that she didn't have a "photographic memory."

Reddington also asked if Clancy had "deep" lacerations on her wrists.

"I wouldn't characterize them as deep," Dr. McDonough said.

Doctors who treated Lindsay Clancy's children testify

The first prosecution witness called Monday was Dr. Michael Snyder, a physician at Beth Israel Deaconess Hospital in Plymouth. He said he was working on the night of the murders and found out "multiple pediatric traumas" were coming into the emergency department.

First responders were giving CPR to Cora and trying to restart her heart as she arrived at the hospital.

"She was not breathing on her own," Dr. Snyder said. "There was no heartbeat."

Prosecutors then called two Boston Children's Hospital doctors who treated baby Callan after he arrived by medical helicopter. Dr. Andrew Capraro said the infant's brain was not getting enough oxygen or blood.

"Can that be caused by strangulation?" the prosecutor asked.

"Most certainly," Dr. Capraro replied.

Dr. David Casavant said a CT scan showed an enormous amount of swelling in Callan's brain.

"When you see swelling that early, that means there was a significant lack of oxygen and damage to the brain itself," he said.

Doctors ended life support for Callan on Jan. 27, 2023.

What's next in the Lindsay Clancy trial?

WBZ-TV legal analyst Jennifer Roman said she expects prosecutors this week to focus on convincing the jury that Clancy is criminally responsible for the murders

"This entire case largely turns on expert testimony, and I think the prosecution has been sort of going very quickly through their first responders, even through Patrick Clancy's testimony, he went very fast," Roman said. "So I think now we're getting closer to the heart of this case and we're going to start to hear this week some expert testimony from the prosecution about her state of mind."

What's happened in the Lindsay Clancy trial so far?

Jurors on Friday visited the Clancy's former home, walking through the basement where investigators say she killed the children. They also saw the upstairs bedroom in which Clancy is said to have cut herself on the neck and wrists before jumping out the second-story window.

Earlier in the week, her ex-husband Patrick Clancy took the stand for two days to talk about her struggles with mental illness and how he discovered his children's bodies on the night of the murders. Lindsay Clancy sobbed as his 911 call was played in court and Patrick could be heard saying, "I need help in the basement right now ... she killed the kids!"

Jurors also heard from first responders who were called to the house that night, as well as doctors who tried to save the children.

If you or someone you know is in emotional distress or a suicidal crisis, you can reach the 988 Suicide & Crisis Lifeline by calling or texting 988. You can also chat with the 988 Suicide & Crisis Lifeline here.

For more information about mental health care resources and support, The National Alliance on Mental Illness HelpLine can be reached Monday through Friday, 10 a.m.–10 p.m. ET, at 1-800-950-NAMI (6264) or email info@nami.org.