Updated August 24, 2026, 11:20 AM EDT By NBC News What to knowClosing arguments are expected this week in the murder trial of Lindsay Clancy, who is accused of killing her three young children — Cora, 5, Dawson, 3, and Callan, 8 months — at their Duxbury, Massachusetts, home in January 2023.Clancy does not dispute that she killed her children. The central question for jurors is whether she can be held criminally responsible for the killings.Prosecutors say the killings were deliberate, arguing that Clancy sent her husband out on errands before strangling the children and then attempting suicide.The defense says Clancy was experiencing postpartum psychosis and was unable to appreciate the wrongfulness of her actions. Defense experts testified that she had bipolar disorder and postpartum psychosis.Clancy’s mental health treatment has been a major focus of the trial. Her defense says she repeatedly sought help in the months before the killings, including an inpatient psychiatric stay, and was prescribed 13 medications over four months.Clancy did not testify. Her defense rested Friday, and now prosecutors are calling rebuttal witnesses. Monday began with a tense cross examination of one of those witnesses by Clancy's defense attorney, Kevin Reddington.The closely watched trial has drawn national attention, particularly around postpartum psychosis and maternal mental health care, with hundreds of supporters gathering outside the courthouse last week. 3m ago / 11:20 AM EDTReddington pushes back on insinuation he kept witness from ClancyThe prosecution spent their final minutes with Mack trying to reaffirm that Clancy was only diagnosed with postpartum depression and not postpartum psychosis. During this questioning, Mack told the court he had a difficult time seeing Clancy himself while she was hospitalized.Just before the court took a break, Reddington jumped in and questioned whether Mack was suggesting his office had any control on whether Mack could see Clancy."I don't know if your office was involved, but I imagine — I don't know," Mack said. "You don't know. Alright, thank you," Reddington responded. "I imagine your office was aware, but I don't know," Mack said before the judge dismissed him.Court is now on a break until the next witness is called.30m ago / 10:53 AM EDTReddington's final words to witness: 'I don't care'To wrap up a very combative line of questioning, Reddington continued to press Mack on the specifics of postpartum psychosis, which Mack continued to avoid saying was a recognized diagnosis.For his final question, Reddington asked about whether Clancy's thyroid should have been checked via bloodwork when doctors were prescribing her a number of different psychiatric medications over the course of just a few months. Mack agreed generally but again rejected the framing of the question around postpartum psychosis, saying, "I’m not sure if that specifically answers your question." Reddington, clearly frustrated, shot back: "I don’t care." He then told the judge he was done with the witness. 45m ago / 10:39 AM EDTProsecution objects to postpartum psychosis questionsThe debate over postpartum psychosis and whether it is a true diagnosis continues, with the prosecution objecting to Reddington's line of questioning of Mack: "He has answered that question repeatedly." Reddington sarcastically responded: "Really?"The judge then urged Reddington to move on.53m ago / 10:30 AM EDTDoctor refuses to say postpartum psychosis is a recognized diagnosisMultiple times, Reddington has asked Mack whether he recognizes postpartum psychosis as a diagnosis and whether he knows the symptoms of the disease.But Mack has insisted he cannot answer those questions easily, and that women who have postpartum depression can experience psychosis, but that postpartum psychosis is not a true diagnosis. Mack said the American Psychiatric Association only considers it a proposed illness at this point. His refusal to recognize postpartum psychosis as a true diagnosis could hurt the defense, as their entire argument hinges on the fact Clancy was suffering from that mental illness. 2h ago / 10:20 AM EDTProsecutors object to Reddington suggesting doctors stop using DSMReddington, while discussing Clancy's diagnosis and treatment with Mack, asked the doctor to stop referring to the DSM — the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association. But Mack said he couldn't leave it out, because all diagnoses are based on the DSM. "Maybe we shouldn't," Reddington suggested, prompting prosecutors to object. It was sustained. 2h ago / 10:11 AM EDT'Postpartum is not a disease'Reddington pressed Mack on Clancy's diagnosis and what that could mean for a postpartum depression or postpartum psychosis diagnosis.Mack kept calling her condition "postpartum" without labeling it as one of the mental diseases that plague women after they give birth, stating that the "postpartum onset" happens within four weeks. But Reddington pointed out a flaw in the doctor's testimony. He said postpartum simply means a woman had a child and that, technically, mothers are postpartum their entire lives. "Postpartum is not a disease, doctor," he said. Amid this exchange, the judge — again — directed Mack to answer the questions he was asked. 2h ago / 10:01 AM EDTReddington presses witness: 'Say it again'Dr. Mack appeared hesitant to answer some of Reddington's questions, responding frequently, "I said this the other day," referring to his first day of testimony on Friday. Reddington appeared to scoff each time Mack said it and had to push him to answer the questions, finally not taking that response as acceptable. "Why don’t you say it again, sir?" he snapped. Defense attorney Kevin Reddington cross examines Dr. Avram Mack today. Greg Derr / Pool via AP2h ago / 9:48 AM EDT'What are you smiling for?'Reddington pressed Mack on the "K Scale," which Mack eventually described as a test used by providers to determine whether patients are exaggerating or lying about their mental health symptoms. But he seemed unwilling to answer Reddington's line of questioning, at one point flashing a smile over Zoom. "What are you smiling for? This is not funny, sir," Reddington shot back. 2h ago / 9:42 AM EDTJudge instructs witness to answer the questionAfter a lengthy and contentious back and forth over questions posed by Reddington, Judge William Sullivan interjected to keep proceedings on topic. “Doctor please. Listen to the question, and answer the question," Sullivan commanded. It came after Reddington pressed Mack on how much money he makes a year. 2h ago / 9:27 AM EDTReddington gets into it with another prosecution wintessTo kick off proceedings on Monday, defense attorney Kevin Reddington quickly got into a testy exchange with a witness.. The trial picked up on the cross examination of prosecution rebuttal witness Dr. Avram Mack. The first part of Reddington's questioning largely focused on Mack's history of serving as a witness in criminal court cases. The exchange quickly got testy, with Mack appearing to misremember or disagree with most of Reddington's questions. When Mack said he disagreed with one of the questions, Reddington shot back, "Says you." 3h ago / 9:02 AM EDTNBC News is waiting to get inside of the courtroomNBC News is waiting to enter the Massachusetts courtroom before what is expected to be the final week of Clancy's trial begins. There’s a growing line of at least 25 people waiting to get inside. Outside, the energy is high, and there is a lot of chatter from onlookers. 3h ago / 8:42 AM EDTLindsay Clancy trial testimony to continue with rebuttal witnessesProsecutors have had one rebuttal witness on the stand so far, and at least two more are expected. They’ve been called to help combat the final defense witness, Dr. Phillip Resnick. Resnick testified that he believes Clancy was living with bipolar disorder and was experiencing postpartum psychosis when she killed her three children and tried to take her own life three years ago.“In her mind, she believed that she would be doing her children a favor by having them go to heaven with her rather than remain on earth without her doing the mothering,” he testified.The first rebuttal witness, Dr. Avram Mack, concluded that Clancy probably suffered from a major depressive episode and anxiety. He said there was no evidence she ever experienced a manic state, which is a key consideration of a bipolar diagnosis.The defense has argued that Lindsay was overmedicated. Mack also addressed this point, doing a deep dive into the medications she was taking. He concluded that while it’s true she did feel side effects, that feeling isn’t necessarily psychotic.Read the full story here. 3h ago / 8:27 AM EDT‘Everything felt so real’: Mothers who experienced postpartum psychosis speak out amid Lindsay Clancy trialThree mothers who survived postpartum psychosis describe their experiences with the condition — and what they want people following the Lindsay Clancy trial to know.“I honestly found my experience humbling because it was a reminder that psychosis does not care about your status or your age or your socioeconomic position,” Ayana Lage, 33, said about her 2020 experience. “It can truly happen to anyone.”Read the full story here. 4h ago / 8:07 AM EDTClosing arguments set to for this week Lindsay Clancy murder trialOnlookers today showed up at court in Massachusetts for what is set to be one of the final days of Clancy's murder trial, in which a jury will determine whether she is criminally responsible for killing her three children. The case has garnered national attention and become a cultural flashpoint, as true crime-obsessed social media users debate the facts in real time. Last week, hundreds in support of Clancy gathered outside of the courtroom. 4h ago / 7:49 AM EDTLindsay Clancy’s 75-year-old lawyer has captivated the internet. Massachusetts has known him for decades.On the fourth day of Lindsay Clancy’s murder trial, prosecutors played the six-minute 911 call her husband made in January 2023 after he returned home and found their three children dead in the basement of their Duxbury home.Sitting in her wheelchair at the defense table, Clancy kept her head down and then began to sob while holding her defense lawyer’s hand.The interaction between Kevin Reddington and his client went seemingly unnoticed inside the Massachusetts courtroom, where Clancy is on trial accused of fatally strangling her three children before throwing herself out of the window in a suicide attempt that has left her paralyzed from the waist down.Defense attorney Kevin Reddington holds the hand of Lindsay Clancy in court on July 29. David L. Ryan / Boston Globe via Getty ImagesBut the move illustrated the unique style of the white-haired 75-year-old lawyer, who has spent decades representing clients with a no-nonsense defense strategy that has captured the hearts and minds of online viewers and true-crime fanatics enthralled by the livestreamed trial.“The internet met Kevin Reddington three weeks ago, but he has been running this defense since 1989,” Molly McPherson, a New England-based crisis communications strategist and host of “The PR Breakdown,” told NBC News.Read the full story here.4h ago / 7:36 AM EDT Court is expected to resume around 9 a.m. ESTThe final days of testimony in Lindsay Clancy's murder trial are expected to begin this week. On Friday, the prosecution began to call rebuttal witnesses after the defense rested its case.Prosecutors have had one rebuttal witness on the stand so far, and at least two more are expected, according to NBC Boston. 4h ago / 7:36 AM EDTLindsay Clancy sought help repeatedly before the killingsIn the months before Lindsay Clancy killed her three children, she sought help from multiple mental health providers, went to an emergency room and spent time at a psychiatric hospital. Her defense says she was prescribed 13 medications over four months as her mental health deteriorated.Here’s a timeline of Clancy’s treatment and efforts to get help before the killings.4h ago / 7:36 AM EDTWhat to know about the Lindsay Clancy murder trialAs closing arguments get underway, the central question facing jurors is not whether Lindsay Clancy killed her three young children, but whether she can be held criminally responsible for their deaths.The closely watched trial has focused on Clancy’s mental health, her treatment in the months before the killings, and the defense’s argument that she was experiencing postpartum psychosis.Read the full story here. 0NBC NewsNBC NewsRebecca Cohen, Doha Madani, and Minyvonne Burke contributed.