Full Breakdown
Lindsay Clancy murder trial: toxicology, mental-health claims and the legal battle
8/6/2026, 10:01:45 PM
The Jan. 24, 2023 killings and trial overview
On January 24, 2023 in Duxbury, Massachusetts, Lindsay Clancy strangled her three children—Cora, Dawson and infant Callan (8 months)—with exercise-resistance bands, then attempted suicide by cutting herself and jumping from a second-story window. She survived but was left paraplegic. The Commonwealth has charged her with three counts of first-degree murder. The trial is being heard in Plymouth Superior Court, with jurors first convening on July 29 2026 and again on August 3 2026.
Prior mental-health history and medication regimen
Clancy’s diary entries, read aloud by her defense, reveal escalating insomnia, anxiety, “brain fog” and feelings of overwhelm beginning in late 2022. She sought care at a postpartum-depression program in December 2022 and was hospitalized briefly on New Year’s Eve. Over the three months before the killings, clinicians prescribed a rotating mix of antidepressants, a mood stabilizer, a sleep aid and an antipsychotic. The defense argues that this “ever-shifting lineup of psychiatric prescriptions” contributed to a severe episode of postpartum psychosis.
Toxicology findings
Forensic toxicologist Dr. Justin Brower of NMS Laboratories testified that Clancy’s blood contained four psychiatric drugs: the antidepressants mirtazapine and trazodone, the mood stabilizer lamotrigine, and the antipsychotic quetiapine (Seroquel). He noted that quetiapine was the only drug with a level “slightly elevated,” but still far below a toxic or suicidal concentration. State-Police crime-lab scientists also reported benzodiazepines in her urine and confirmed that none of the children’s post-mortem toxicology screens detected drugs.
Legal positions
- Defense (Attorney Kevin Reddington) concedes that Clancy killed her children but argues she lacked criminal responsibility because she was experiencing postpartum psychosis.
- Judge William Sullivan accepted a stipulation that the Commonwealth need not prove chain-of-custody details for the blood, DNA and exercise bands, thereby streamlining the evidentiary phase.
Conflicting toxicology interpretations
The Guardian’s coverage reports that quetiapine was “slightly elevated” but not toxic, whereas the Boston Herald notes the level was “about double the therapeutic level,” still below lethal thresholds. Both agree the other three drugs were within therapeutic ranges. The discrepancy centers on how “elevated” is quantified, a point the defense highlighted to argue that raw concentrations cannot fully explain Clancy’s mental state.
Verbatim quotes
- “Usually people take handfuls of pills when they’re trying to harm themselves and take their own life, and this is not consistent with that,” — Justin Brower
- “This is not a public debate about women's mental health and how the medical system treats women,” — Shanan Buckingham, assistant district attorney
- “What you're saying is that the numbers alone do not tell the tale of what happened to a particular individual, right?” — Kevin Reddington
What’s next
The trial will resume after a brief recess, with additional psychiatric experts expected to testify on postpartum psychosis and its interaction with the medication regimen. The jury will later consider whether Clancy’s mental condition meets the legal standard for a not-guilty-by-reason-of-insanity verdict. If convicted, she faces life imprisonment without parole; a finding of lack of criminal responsibility would result in commitment to a state mental-health facility.
