Lindsay Clancy holdout juror had no doubt she deliberately killed her children

Notably, the lone holdout juror in the trial of Lindsay Clancy has remarked he "didn't have any doubts" that she was criminally responsible for killing her three children.

Key points

• The next court hearing is scheduled for 29 September at Plymouth Superior Court in Massachusetts.
• Patrick Clancy, the children's father and Lindsay Clancy's ex-husband, is due to speak publicly regarding the case in an interview with the CBS programme 60 Minutes on Sunday.
• The judge declared a mistrial on 4 September after the jury failed to reach a unanimous verdict after almost 40 hours of deliberating.
• A number of jurors have stated after the mistrial being declared that the panel was ultimately divided 11-1 in favour of finding Clancy not criminally responsible.
• Paula Devlin, one of the other jurors, informed CBS Mornings that the panel had spent a number of days trying to convince Desronvil to change his mind.

"Based on all the physical evidence, key witnesses and what the prosecution presents, I thought it was enough proof that she knew exactly what she was doing and planned it, " Michael Desronvil remarked in an official note to CBS News, the BBC's US partner.

For context, the judge declared a mistrial on 4 September after the jury failed to reach a unanimous verdict after almost 40 hours of deliberating.

Clancy admitted to the killings but her lawyers argued she had been suffering from postpartum psychosis. Prosecutors remarked the killings were calculated. Warning: This article contains distressing details.

Notably, the 36-year-old was charged with three counts of first-degree murder after strangling Cora, five, Dawson, three, and Callan, eight months, at the family's Massachusetts home before jumping out of the second-floor window.

To find Clancy guilty, jurors had to be unanimously convinced beyond reasonable doubt that she intentionally killed her children and that she did not do so since of postpartum psychosis, a rare and serious condition.

In practice, the jury – nine women and three men – considered a range of options including not guilty by reason of insanity, manslaughter and first-degree murder.

Meanwhile, a number of jurors have stated after the mistrial being declared that the panel was ultimately divided 11-1 in favour of finding Clancy not criminally responsible.

Desronvil remarked he believed the evidence presented in court demonstrated she had planned the killings.

"I didn't have any doubts, " he remarked in an official note to CBS on Thursday.

"As I tried to explain different possible theories during deliberation, I kept getting cut off as if I had doubts based on the evidence presented."

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"We all worked together to convince ourselves once we got to that point where it was 10 to 2, " she remarked.

Notably, the jury foreperson, a retired fifth-grade teacher, described not being able to reach a verdict as "awful" and an "emotional rollercoaster".

She informed NBC that Desronvil had "admitted he had reasonable doubt", but as she kicked off filling out the verdict sheets, he apparently noted: "But I'm still not going to say that she's not guilty by reason of insanity."

Another juror informed local CBS station WBZ-TV that most of the jurors had been "very firm in their stance" from the start and "the stand-alone juror was not the only one that was unwilling to see things from the other side".

But they continued that as Desronvil would not "follow" his reasonable doubt nor offer logical reasoning for his position, they felt Clancy had not receive a fair trial.

Meanwhile, the identities of all 11 jurors have not been officially disclosed but in the US, once a case is over, any juror can choose to speak publicly regarding a case and their deliberations.

In it, he is projected to discuss his grief, his memories of his children and the conspiracy theories that have flooded social media since the trial began.

He remarked he still speaks to his children "all the time", describing it as "a way I stay connected to them".

As well as seeking assist from a suicide hotline and an emergency room, as evidence of her psychosis, during the trial, Clancy's defence team had attempted to employ her being put on more than a dozen medications in the lead-up to the killings.

Postpartum psychosis can involve hallucinations and delusions, and her lawyers argued that she was unable to understand the nature of her actions or distinguish right from wrong.

In practice, a forensic psychiatrist who testified for the defence remarked Clancy experienced a "command hallucination" and a "delusion of influence" when she killed her children.

While another psychiatrist observed that the condition was not at present recognised by the American Psychiatric Association, nevertheless, her psychiatrist testified for the prosecution that Clancy did not show signs of psychosis during their sessions.

Under Massachusetts law, prosecutors had to prove beyond any reasonable doubt that Clancy was criminally responsible for the jury to find her guilty. The defence did not have to prove her mental illness or lack of criminal responsibility.

Notably, the mistrial leaves the case unresolved. Prosecutors have not remarked whether they will seek a retrial.

Clancy's lawyer, Kevin Reddington, has remarked he hopes to reach an agreement with prosecutors to avoid a second trial.

He informed ABC's Good Morning America that he was upset that the lone juror would not acquit Clancy.

He remarked the holdout "would not apply the law of reasonable doubt" as instructed by the judge, adding: "That's not right. And that's why I was upset."

In practice, the next court hearing is scheduled for 29 September at Plymouth Superior Court in Massachusetts.

For now, lindsay Clancy holdout juror had no doubt she deliberately killed her children remains the part of the story worth watching, and further updates are likely as more details are confirmed.