The Lindsay Clancy murder trial has entered another closely watched phase as the defense turns its attention to the mental-health care Clancy received in the months before the deaths of her three young children.

At the center of the courtroom questioning is Dr. Jennifer Tufts, one of the psychiatrists who treated Clancy before the January 2023 tragedy.

What happened during those months — and what her doctors knew about her worsening condition — has become one of the most important questions in the trial.

The defense is not disputing the devastating outcome. Instead, attorney Kevin Reddington is seeking to establish a broader picture of Clancy’s mental state and the treatment she received before the killings.

And now, jurors are hearing testimony that has raised difficult questions about communication between providers, medication decisions and whether the full extent of Clancy’s symptoms was recognized at the time.

Dr. Tufts treated Clancy during the months leading up to January 2023, including through a series of appointments conducted remotely.

During her testimony, the defense questioned Tufts about her experience, clinical decisions, documentation and the medications prescribed to Clancy.

The questioning has become particularly significant because the defense’s central argument revolves around Clancy’s mental state.

Her attorneys contend that she was suffering from a severe psychiatric disorder, including postpartum psychosis, and argue that her condition deteriorated despite attempts to obtain treatment.

Prosecutors, meanwhile, have offered a very different interpretation of the evidence and continue to argue that Clancy should be held criminally responsible.

That disagreement places the mental-health treatment she received under intense courtroom scrutiny.