The m*rder trial of Lindsay Clancy has entered an increasingly intense phase as jurors hear detailed testimony about her deteriorating mental health, severe insomnia, suicidal thoughts and a rapidly changing series of psychiatric medications in the months before the deaths of her three children.

Clancy, a former labor-and-delivery nurse, is accused of killing her children—5-year-old Cora, 3-year-old Dawson and 8-month-old Callan—in their Duxbury, Mᴀssachusetts, home in January 2023. She has pleaded not guilty. Her defense does not dispute that she caused the children’s deaths but argues that she was suffering from severe postpartum psychosis and was not criminally responsible for her actions. Prosecutors maintain that the killings were deliberate.

Recent testimony has placed Clancy’s psychiatric treatment under a microscope. Psychiatric nurse pracтιтioner Rebecca Jollotta testified that Clancy reported severe depression, anxiety, insomnia and intrusive thoughts. She also discussed concerns about medication side effects and dependence, repeatedly seeking changes to her prescriptions because she felt her condition was not improving.

A particularly striking element of the defense’s case is the number of medications Clancy was prescribed in a relatively short period. Court testimony and evidence have indicated that 13 psychiatric medications were prescribed by multiple providers over roughly four months, including antidepressants, antipsycH๏τics, sedatives, benzodiazepines and a mood stabilizer. The defense argues that this complicated treatment history contributed to a dangerous deterioration in Clancy’s mental state.

Her former husband, Patrick Clancy, previously testified that Lindsay’s mental health appeared to worsen dramatically toward the end of 2022. He recalled suicidal statements and told jurors that she had expressed thoughts about harming the children, even though he said he never witnessed her actually hurt them. He also described a confusing period in which she could appear deeply distressed and then return to ordinary activities such as preparing meals or putting the children to bed.

But prosecutors have highlighted evidence pointing in a very different direction. They argue that Clancy’s behavior showed awareness and planning, and they have challenged the suggestion that medication alone explains what happened. Testimony has also indicated that some medications were discontinued or that Clancy took only limited amounts from certain prescriptions, creating another point of dispute between the two sides.

Perhaps most importantly, the testimony has revealed gaps in communication between Clancy’s different healthcare providers. Jollotta acknowledged that she did not obtain complete records from every other clinician involved in Clancy’s treatment and did not consult some of those providers. The defense has seized on those gaps as evidence that no single clinician necessarily had a complete picture of how rapidly Clancy’s condition was changing.

At the same time, medical testimony does not provide a simple answer. One clinician testified that Clancy did not display signs of psychosis during her care, while the defense relies on later forensic psychiatric opinions diagnosing postpartum psychosis. The competing interpretations leave the jury with the central question of the trial: Was Clancy experiencing a severe mental disorder that prevented her from understanding or controlling her actions, or did she remain legally responsible for the killings?

As testimony continues, the courtroom is being asked to reconstruct the final months of Clancy’s life—not simply through what happened on the night of the deaths, but through medical records, prescription histories, family testimony and the observations of the professionals who treated her.

For the families involved, the evidence is about far more than medication lists and psychiatric diagnoses. It is an attempt to understand how a mother described by some witnesses as loving and attentive could ultimately become responsible for the deaths of her three children—and whether the warning signs were recognized before it was too late