Exonerated

Ontario Court of Appeal acquits mother convicted in 2002 on discredited shaken baby evidence

Twenty-four years after a jury convicted Jennifer Gaskin of manslaughter in the death of her newborn son, fresh expert reports undermined the pathology evidence that shaking caused the death. With the Crown's consent, the court found the conviction unsustainable because of flawed pathological evidence, set it aside, entered an acquittal and called her the victim of a miscarriage of justice.

R. v. Gaskin, 2026 ONCA 694

5 min read

Court: Court of Appeal for Ontario
Decided: Sep 29, 2026
Conviction to this result: 24 years
Sentence: Two years less a day in a reformatory, served in full

Appeal allowed, conviction set aside, acquittal entered; the court said she was wrongly convicted An authority has cleared the person, or the case ended in a way recognised as an exoneration.

What happened

In 1999 Ms. Gaskin's newborn son collapsed suddenly and died. The postmortem, carried out by pathologist Dr. David Welbourne, found injuries to the brain, spinal cord, eyes and neck, but no external injury and no skull fracture. At trial in 2002 the Crown's theory was that Ms. Gaskin had shaken the baby out of frustration because he was crying. Dr. Welbourne and neuropathologist Dr. William Halliday both told the jury that shaking caused the injuries and the death. The jury convicted her of manslaughter, which means causing death by an unlawful act without intending to kill. She was sentenced to two years less a day in a reformatory, a provincial prison. She served the sentence and did not appeal. In 2010 she agreed to let the Shaken Baby Death Review Committee send the medical evidence to an International Medical Panel. The Panel reported that although there was evidence of a head injury, it was not clear that it caused the death. In 2011 the Committee told her it had concerns about her case. In 2014 the Court of Appeal gave her more time to appeal. With counsel, she retained three new experts: Dr. David Ramsay, a forensic neuropathologist; Dr. Chris Van Ee, a biomechanical engineer; and Dr. Christopher Milroy, a forensic pathologist. She asked the court to admit their reports as fresh evidence and to enter an acquittal. The Crown agreed.

Procedural history

1999
Ms. Gaskin's newborn son collapsed and died; a postmortem was carried out; her partner at the time gave a statement to police on July 2, 1999
May 28, 2002
Jury convicted Ms. Gaskin of manslaughter after hearing expert evidence that the injuries pointed to shaken baby or shaken impact syndromeSuperior Court of Justice
Undated
Sentenced to two years less a day in a reformatory; she served the sentence and did not appealSuperior Court of Justice
Feb 2010
Ms. Gaskin consented to the Shaken Baby Death Review Committee having the medical evidence reviewed by the International Medical Panel
Mar 2010
International Medical Panel reported uncertainty about the cause of death and the timing of any injury
Mar 16, 2011
Ms. Gaskin informed that the Committee had concerns about the evidence in her case
2014
Extension of time granted to appeal the conviction based on fresh evidenceCourt of Appeal for Ontario
Jan 19, 2026
Ms. Gaskin swore an affidavit in support of the appeal
Sep 29, 2026
Appeal heard and decided orally; fresh evidence admitted, conviction set aside and acquittal entered with the Crown's consentCourt of Appeal for Ontario

The offence and its elements

Manslaughter

Criminal Code (section not cited in the reasons)

What the prosecution had to prove:

The accused committed an unlawful act; the Crown's theory at trial was that she vigorously shook the child (the reasons do not label the alleged act as any particular offence)not addressedGeneral law: check the current text
The unlawful act was a contributing cause of death that was more than minimalnot addressedGeneral law: check the current text
The unlawful act was objectively dangerous, meaning a reasonable person would have foreseen a risk of bodily harm that was neither trivial nor transitorynot addressedGeneral law: check the current text
The accused was the person who did the actnot addressedGeneral law: check the current text

The questions on appeal

Should the three new expert reports be admitted as fresh evidence on appeal?: Yes. The court said each report met the test for admissibility of fresh evidence. It found the evidence relevant and credible, bearing on guilt, and reasonably capable of having affected the result at trial. The reasons name no authority for the test and do not discuss whether the evidence could have been obtained for trial.
What is the right remedy: a new trial or an acquittal?: An acquittal. Ms. Gaskin submitted that the fresh evidence, taken with the other evidence, left no prospect of a conviction. The Crown agreed. The court also agreed, saying the fresh evidence showed the conviction was unsustainable, and it entered an acquittal rather than ordering a retrial.

The law the court applied

Admissibility of fresh evidence on appeal (criteria as stated by the court at para 12)

Fresh evidence is evidence that was not before the trial court. The court said each report met the test for admissibility and identified these features: the evidence is relevant, it is credible, it bears on Ms. Gaskin's guilt, and it could reasonably be expected to have affected the result at trial. The reasons name no case authority for the test. They also do not address the further consideration that is usually part of the general approach to fresh evidence in Canada, namely whether the evidence could, with due diligence, have been produced at trial. Readers should treat para 12 as the court's application of the test in this consent case, not as a complete statement of the law.

R. v. Gaskin, 2026 ONCA 694 at para 12 (no case authority named in the reasons)

Acquittal rather than a new trial (as submitted by the appellant and accepted)

The reasons do not set out a test of their own for choosing between a retrial and an acquittal. Ms. Gaskin submitted that an acquittal was the proper remedy because the fresh evidence, taken with the other evidence, left no prospect of a conviction. The Crown agreed with that submission and the court said it also agreed, finding the conviction unsustainable. Readers should treat the 'no prospect of a conviction' wording as the appellant's formulation, accepted in this case, not as a rule the court stated.

Appellant's submission at R. v. Gaskin, 2026 ONCA 694, para 13, accepted at paras 14 to 15

What the court decided

A three-judge panel of the Court of Appeal for Ontario, ruling orally on the day of the hearing, admitted the three expert reports as fresh evidence, allowed the appeal, set aside the manslaughter conviction and entered an acquittal. The Crown consented to every step. The court said the fresh evidence showed the conviction was unsustainable, that Ms. Gaskin was the victim of a miscarriage of justice, and that she was wrongly convicted because of what has been shown to be flawed pathological evidence. The court described the case as another in a sad litany of wrongful convictions based on the discredited shaken baby syndrome, brought about in part by unreliable expert evidence. It noted that the case was not one of Dr. Charles Smith's but took the same flawed approach to the forensic science, and it said it has set aside convictions in many such cases, giving a list of examples that ranged from R. v. Mullins-Johnson, 2007 ONCA 720, 87 O.R. (3d) 425 to R. v. Doyle, 2023 ONCA 427, 428 C.C.C. (3d) 293. The list is introduced with the word including, so it is not presented as complete, and the reasons do not say what the evidence was in each of those cases. The court also ordered that the names of Ms. Gaskin's other children not be published.

What happens next: The reasons say nothing about any further step.

Analysis

This is our commentary, separate from the court’s reasons.

Why the case turned on science, not on new facts

Nothing about the events of 1999 changed. What changed was what medicine can say about them. At trial, the triad of findings that medical understanding in 2002 took to be evidence of shaken baby syndrome supported the conclusion that the baby was shaken. The new reports attack that reasoning from three directions. The neuropathologist says the lesions read at trial as bruises were in fact strokes of undetermined cause, and that the diagnosis of exclusion, meaning the process of ruling out other explanations such as infection or clotting disorders, was incomplete by current standards. The biomechanical engineer says the studies he reviewed do not support the idea that shaking without impact generates enough force to cause these injuries. The forensic pathologist says modern investigation of infant death uses tests that did not exist in 1999, and classifies the cause of death as undetermined. The experts do not agree on a single answer. One says the cause may have been a head injury or natural causes; another calls it undetermined. The court did not decide the cause of death. It held that the conviction could not stand because the pathology evidence that supported it had been shown to be flawed.

The significance of the acquittal rather than a retrial

When a conviction is set aside on fresh evidence, a court may order a new trial so that a jury can hear the new material, or it may enter an acquittal. The reasons do not set out a test for that choice. Ms. Gaskin submitted that there was no prospect of a conviction on the fresh evidence taken with the rest, the Crown agreed, and the court said it also agreed and that the conviction was unsustainable. The reasons give no further analysis. What gives the result its weight is the court's own language. It used the words wrongly convicted and miscarriage of justice. That is the court's finding, not only an agreed outcome, and it gives a clear answer to anyone who later asks what the courts decided.

What the timeline shows about the system

The timeline is sobering. The medical panel reported doubts in 2010, the court granted an extension to appeal in 2014, and the acquittal came in 2026. The reasons do not explain the twelve years between the extension and the hearing, and readers should not assume who was responsible. The reasons do show how the doubts reached the courts: through a review committee examining the medical evidence, then an international panel, then three new expert reports from experts retained by Ms. Gaskin with the assistance of counsel. The court also showed its awareness of a wider pattern. It called this another in a litany of wrongful convictions based on discredited shaken baby syndrome and unreliable expert evidence, listed examples of convictions it has set aside, and expressly noted that this case did not involve the disgraced pathologist Dr. Charles Smith but took the same flawed approach to the science. The problem the court identified was the approach to the forensic evidence, not one individual.

If this feels close to home

A conviction that was never appealed can still be challenged years later. An appeal court can extend the time to appeal where there is a real basis, such as fresh evidence, as happened here in 2014.
Fresh expert evidence can succeed where the science itself has moved on. Here the court said the reports met the test for fresh evidence because they were credible, relevant, bore on guilt and could reasonably have affected the result. The reasons name no authority and do not discuss whether the evidence could have been obtained for trial, which is usually also part of the general approach, so this case should not be read as a complete statement of the test. The court made no finding about the trial experts' good faith either way.
An acquittal on appeal, rather than a retrial, was entered here after the appellant submitted that the fresh evidence left no prospect of a conviction and the Crown agreed. The court still stated its own conclusion that the conviction was unsustainable. Whether Crown agreement makes that outcome more likely in other cases is commentary, not something the reasons say.
This decision records that the Ontario Court of Appeal has set aside convictions in many cases involving discredited shaken baby syndrome or unreliable expert evidence. In this case, the path to the court ran through a review committee, an international medical panel and three new expert reports.
Progress in these cases is often slow and may depend on expert reports in several disciplines. Reports here, from experts retained by Ms. Gaskin, came from neuropathology, biomechanics and forensic pathology, each addressing a different weakness in the original evidence.

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What went wrong

Flawed forensic science Fresh evidence

How this was checked

Written by Claude Fable 5.1 (Anthropic AI) from the source below, then independently audited against it by Claude Sonnet 5.5 (Anthropic AI) on Nov 5, 2026. Every citation here was confirmed by software to appear in the decision or an official text. No lawyer has reviewed this brief. Our standards

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Citations

R. v. Gaskin, 2026 ONCA 694 The present decision
R. v. Mullins-Johnson, 2007 ONCA 720, 87 O.R. (3d) 425Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Sherret-Robinson, 2009 ONCA 886Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. C.M., 2010 ONCA 690Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. C.F., 2010 ONCA 691Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Kumar, 2011 ONCA 120, 268 C.C.C. (3d) 369Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Marquardt, 2011 ONCA 281Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Brant, 2011 ONCA 362Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Shepherd, 2016 ONCA 188Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Blackett, 2018 ONCA 119Cited by the court as an example of a conviction it has set aside in cases of this kind
R. v. Doyle, 2023 ONCA 427, 428 C.C.C. (3d) 293Cited by the court as the most recent example in its list of convictions set aside in cases of this kind

Sources

R. v. Gaskin - 2026 ONCA 694 - 2026-09-29

This brief is general information about one case. It is not legal advice, and it may not reflect later developments. Read the full reasons and speak to a lawyer about your own situation.