New testimony in the Lindsay Clancy murder trial is bringing renewed attention to a series of messages she sent to a nurse practitioner in the weeks before the deaths of her three children — revealing just how serious her mental-health struggles had become before the January 2023 tragedy.

During testimony this week, jurors heard details about Lindsay Clancy’s communications with psychiatric nurse practitioner Rebecca Jollotta, who treated Clancy through a perinatal behavioral-health program. The testimony has become an important part of a trial increasingly focused on one central question: What was happening to Clancy mentally in the weeks leading up to the deaths of her children?

Clancy is accused of killing her three children — 5-year-old Cora, 3-year-old Dawson and 8-month-old Callan — at the family’s Duxbury, Massachusetts, home on January 24, 2023. She then attempted suicide by jumping from a second-story window and survived with severe injuries that left her partially paralyzed.

According to testimony reported from the current trial, Clancy had been experiencing increasingly troubling symptoms before the killings.

On December 15, 2022, Clancy and her then-husband contacted Jollotta after Clancy reported persistent suicidal thoughts. Jollotta urged her to receive inpatient psychiatric treatment. However, according to testimony, a facility later declined to admit her because of concerns involving the medications she was taking. Clancy instead continued treatment through an outpatient program.

Jollotta testified that she considered whether Clancy could have bipolar disorder and observed symptoms including insomnia, racing thoughts and suicidal ideation. At the time, however, Jollotta did not believe Clancy was psychotic.

Those details are now receiving intense scrutiny because they provide jurors with a window into Clancy’s mental state only weeks before the deaths.