Defence asks for no jail time in rare and ‘tragic’ infanticide case in P.E.I.

coronate, defence split up on condemn in rarified infanticide case in P.E.I.

WARNING: This story contains disturbing details of physical and sexual abuse and self-harm. Resources and supports can be found at the bottom of this story.

The lawyer for a woman who admitted to killing her infant daughter in Charlottetown last year while suffering from postpartum depression asked that his client receive no jail time for the crime — details of which have been unveiled in court for the first time. 

Cassie Marie Acorn, 40, was originally charged with first-degree murder in the death of her three-month old daughter, however, after a psychiatrist determined Acorn had a “disturbance of the mind” at the time of her child’s death, she was able to plead guilty to infanticide instead.

During a hearing on Tuesday, Crown attorney John Diamond asked the judge to sentence Acorn to one year in jail, followed by two years of probation and mandatory counselling.

Acorn’s lawyer said that was not unreasonable, but he instead argued that Acorn should avoid jail time altogether through either a long period of probation or serving a sentence on house arrest. 

“I think this is a tragic case,” legal aid director Thane MacEachern told the court, adding that it’s one that has had a profound impact on Acorn, her deceased daughter and the community at large.

The court heard that a psychiatrist’s report concluded that Acorn’s now deceased infant, Winter Elizabeth Rose Acorn, was conceived as a result of a sexual assault. 

Despite the manner of conception, Acorn wanted her child to be born, even after her medical team advised her to terminate the pregnancy after abnormal prenatal scans.

The psychiatrist wrote there was no evidence Winter was resented by Acorn, who was excited about having a daughter.

“Cassie was a vulnerable woman…. She was provided surgical intervention preventing further pregnancies, and she appeared to desire the chance to fully experience motherhood with her last child. She seemed to derive a sense of purpose and identity through her role as a mother,” Dr. Hygiea Casiano wrote.

“She was likely eager to prove others wrong and demonstrate that she was capable of parenting well.”

A psychologist also concluded Acorn had an intellectual disability in the “mild range” and test results showed the possibility of post-traumatic stress disorder, a persistent depressive disorder and at least four other conditions or disorders. 

The report said Acorn had also been a victim of abuse at the hands of a former partner. 

The psychiatrist’s report said that despite her desire to be a good mother, Acorn found herself as a single parent of two for the first time in December 2024 when both of her children were in her custody, and she was overloaded.

“With all of the stressors piling up on her, including abdominal infection, a daughter with feeding troubles, child welfare scrutiny, sleep deprivation, and a return of an abusive ex-fiancé who did not accept the infant, the accused’s defence mechanisms were likely overwhelmed,” Casiano wrote, noting this led to postpartum depression and anxious distress.

Winter was also having medical issues that contributed to her difficulty feeding. She was tongue-tied and had skull deformities due to low muscle tone. Both a family member and a nurse practitioner had tried to feed the baby with little success.

The report indicates Acorn was very fearful that Child Protective Services would remove her toddler and infant from her care. 

The psychiatrist wrote that this likely led to Acorn minimizing her problems during a first appointment with a counsellor at Sexual Health, Options & Reproductive Services, who concluded she did not have postpartum depression about two weeks before Winter’s death.

Shortly after, Acorn’s former partner re-entered her life, which the psychiatrist said likely triggered a depressive episode in which she quickly deteriorated, became suicidal and impulsively tried to harm herself — something she had not done in many years. 

In the weeks leading up to Winter’s death, Acorn also expressed that she could not let her daughter cry because she lived in an apartment — further adding to the pressures she felt.

“Ms. Acorn was a battered woman with an intellectual disability and postpartum depression who was combating pressures from child welfare whom she believed were considering the apprehension of her children,” Casiano wrote.

“The available evidence points to the theory that the defendant, under duress from her mental illness, with sleep deprivation, and with a lower capacity to problem-solve, did not know how to quiet Winter in the moment leading up to Winter’s death.”

On the evening of March 16, 2025, Acorn called 911 to report that Winter had thrown up after feeding and was unresponsive. 

The baby was taken to the QEH where a doctor noticed fractures to her skull and facial bones, so Winter was put on a helicopter to Halifax and Charlottetown police were notified about the injuries as a potential child abuse case.

Winter was pronounced brain dead days later. 

Acorn did not originally provide any explanation for the injuries, but within a few days, told the Nova Scotia Medical Examiner that she'd dropped the infant when bathing her in the sink, and the baby landed on her head on the hardwood floor. 

The mother said she didn’t tell anyone because “she would get in trouble.” 

P.E.I. Mother with postpartum depression pleads guilty to infanticide for killing 3-month-old daughter

Days later, while back in P.E.I., Acorn went to see her nurse practitioner as she was struggling with her mental health. She told the nurse she caused the injuries to her baby, and because she was in a distressed state, Acorn was sent to the hospital to see a psychiatrist.

She told that doctor she was overwhelmed with her single parenting situation and when Winter would not stop crying, she did not realize what she was doing and banged the baby’s head on the floor — but immediately called 911 and her support worker when she realized the infant wasn’t breathing.

After leaving the hospital, Acorn went with her support worker to the police. The detective was not available so she was told to reach out at a later date. 

She did this on April 9 when she went back to the station. She was arrested for first-degree murder and police announced the charges against her in a news release the same day.

The medical examiner later concluded the cause of death was blunt-force head trauma, but the manner of that injury was undetermined. The psychiatrist concluded that it appeared Acorn struck the baby’s head against the ground while dressing her on the floor.

On Tuesday, Acorn’s lawyer told the court this was done impulsively and had catastrophic results that are understood best by Acorn, who has to live in the aftermath of her actions.

Both the Crown and defence told Judge Jeff Lantz that while there have been other cases of infanticide across the country, there were no cases with circumstances similar to this one.

Both lawyers also acknowledged the complicated situation of Acorn’s mental state — which is what allowed her to plead guilty to infanticide in the first place — and noted society views this as one of the worst crimes possible.

“The facts of this case can’t be any more serious,” Diamond said. €œA mother, in this case, is responsible for the death of her own child.”

Diamond said he believed a period in jail was required, but just one year. The maximum under the Criminal Code of Canada would be five years in prison. He said the suspended or conditional sentence that MacEachern asked for would be inappropriate.

”This gives recognition to the guilty, as well as an exercise of restraint,” Diamond said.

Both sides submitted written versions of their arguments to the judge. In those, Diamond made mention of Acorn not showing remorse and taking steps to conceal what she’d done — allegations her lawyer refuted. 

“Ms. Acorn is living it first hand and, more than anyone, recognizes the impact of her actions,” MacEachern told Lantz.

”Ms. Acorn continues to show remorse, [and] has broken down on a number of occasions.”

MacEachern told the court Acorn has been in a difficult period of reflection and one of her conclusions is that she is not capable of parenting. 

He also said she has received threats and messages from people in the community. 

”She found herself in a position she probably should not have been in,” MacEachern said, noting that position was also “supported by others.”

Lantz said he could not make a decision on a sentence Tuesday. He will deliver that at the end of January. 

There are resources and supports available to anyone who has experienced sexual violence:

Video Journalist

---

---