The murder trial of Lindsay Clancy began on Monday at Plymouth County Superior Court in Plymouth, Massachusetts, and from the very first day it is clear this is going to be one of the most distressing cases in recent American legal history. Clancy, 35, is accused of strangling her three young children, Cora, five, Dawson, three, and eight-month-old Callan, with resistance bands inside the family home in Duxbury in January 2023. She faces three counts of first-degree murder and life in prison without parole.

Her defence attorney Kevin Reddington entered an insanity plea on the first day of proceedings, describing the case as "probably the most emotionally disturbing and challenging" of his career. He is not wrong. The medical logs presented to jurors paint a picture of a woman who was in serious psychiatric crisis for months before the killings, in and out of mental health facilities, and prescribed an alarming number of medications simultaneously.

According to the New York Times, those medications included daily doses of Ambien, Klonopin, Valium, Prozac, Ativan, Zoloft and Seroquel, all at the same time. More than a dozen prescriptions in total. Her husband Patrick has filed a separate lawsuit against her medical team, arguing they failed to monitor her or address her worsening condition. The logs show she was battling anxiety, depression, insomnia, suicidal thoughts, racing thoughts and an unrelenting fear that something awful was going to happen.

On the day of the murders, January 24, 2023, the logs record that she reported hearing a "compelling and unrecognizable singular male voice" telling her she should die, that this was her last chance, and that her children would suffer if she was gone. Patrick had left the house to pick up takeout. While he was gone, Cora and Dawson were killed. Callan died in hospital three days later.

After the killings, Clancy allegedly cut her wrists and neck and jumped from a second-story window. She was found by Patrick when he returned home. The fall left her with spinal injuries that still prevent her from walking today.

Prosecutors are pushing back hard on the insanity defence, arguing the killings were "deliberate, premeditated and of extreme atrocity and cruelty," and that Clancy spent eight months methodically planning what she did. The prosecution's version of events and the defence's version are so far apart it is difficult to believe they are describing the same woman. That is exactly what makes this trial so difficult, and so important, to follow.

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