Overturned convictions in Canada

Historical Context and Legal Framework

The federal power to review potential wrongful convictions in Canada has existed since 1892, when the Minister of Justice was first granted authority to order remedies such as new trials. This process, known as a criminal conviction review, allows individuals to apply for a ministerial review under the Criminal Code. Lawyers in the Criminal Conviction Review Group investigate applications and recommend actions to the Minister, who can order a new trial or refer the matter to a provincial court of appeal. In February 2023, the government introduced Bill C-40, the Miscarriage of Justice Review Commission Act, to establish an independent commission for these reviews. Non-profit organizations like Innocence Canada also review cases, investigate new evidence, and pursue legal paths to exoneration. Public inquiries, such as the one following the Donald Marshall Jr. case, have exposed systemic failures. Common causes of wrongful convictions include eyewitness misidentification and flawed forensic science. The royal commission into Donald Marshall Jr.'s case made numerous recommendations for reform. The power to review convictions was expanded in 2002 to allow the Minister to consider any matter relevant to the application.

Notable Cases and Exonerations

Several high-profile cases have shaped the understanding of wrongful convictions in Canada. Donald Marshall Jr., a Mi'kmaq man, was wrongfully convicted of murder in 1971 and served 11 years in prison before being acquitted in 1983. Steven Truscott was convicted in 1959 at age 14 for rape and murder and was sentenced to death, later commuted to life imprisonment. He was acquitted in 2007 and awarded $6.5 million in 2008. David Milgaard was convicted in 1970 of murder and spent 23 years in prison before DNA evidence exonerated him in 1992, leading to a $10 million compensation package in 1999. Thomas Sophonow was tried three times in 1982, 1983, and 1985 for a 1981 murder before being acquitted by the Manitoba Court of Appeal in 1985. Kyle Unger was convicted in 1992 of murder and his charges were withdrawn in 2009. Glen Assoun was convicted in 1999 for a 1995 murder and was acquitted in 2019. James Driskell was convicted in 1991 of murder and his conviction was quashed in 2005. Guy Paul Morin was convicted in 1992 of murder and was acquitted in 1995 after DNA testing excluded him. Robert Baltovich was convicted in 1992 of murder and was acquitted in 2008 after a directed verdict.

• Donald Marshall Jr.: Convicted 1971, acquitted 1983.
• Steven Truscott: Convicted 1959, acquitted 2007.
• David Milgaard: Convicted 1970, exonerated by DNA in 1992.
• Thomas Sophonow: Tried three times between 1982 and 1985, acquitted 1985.
• Kyle Unger: Convicted 1992, charges withdrawn 2009.
• Glen Assoun: Convicted 1999, acquitted 2019.
• James Driskell: Convicted 1991, conviction quashed 2005.
• Guy Paul Morin: Convicted 1992, acquitted 1995.
• Robert Baltovich: Convicted 1992, acquitted 2008.

The Charles Smith Forensic Pathology Scandal

Wrongful convictions in Ontario are linked to the discredited work of forensic pathologist Dr. Charles Smith. Smith conducted autopsies and provided expert testimony in cases involving child deaths, often concluding homicide. His flawed analyses led to wrongful convictions. The Ontario Court of Appeal has overturned multiple convictions based on Smith's work. Sherry Sherrett-Robinson was convicted in 1999 of infanticide and was acquitted in 2009. Tammy Marquardt was convicted in 1995 of murder and her conviction was quashed in 2011. Maria Shepherd pleaded guilty to manslaughter in 1992 and was acquitted in 2016. A public inquiry into pediatric forensic pathology in Ontario criticized Smith's work and systemic failures. William Mullins-Johnson was convicted in 1994 of murder based on Smith's evidence and was acquitted in 2007. He received a $4.25 million settlement in 2010. The inquiry led by Justice Stephen Goudge examined Smith's errors and made recommendations to improve forensic pathology in Ontario. Smith's errors were found in several cases reviewed, with some resulting in wrongful convictions or guilty pleas.

• Sherry Sherrett-Robinson: Convicted 1999, acquitted 2009.
• Tammy Marquardt: Convicted 1995, conviction quashed 2011.
• Maria Shepherd: Convicted 1992, acquitted 2016.
• Dinesh Kumar: Pleaded guilty 1992, acquittal entered 2011.
• Richard Brant: Pleaded guilty 1995, acquittal entered 2011.
• O'Neill Blackett: Pleaded guilty 2001, cleared in 2018.
• William Mullins-Johnson: Convicted 1994, acquitted 2007.

Appeal Processes and Grounds for Overturning

Convictions in Canada are most commonly overturned through the appellate court system, where errors in the original trial are identified. The Ontario Court of Appeal has quashed convictions in numerous cases after finding legal misapplications or prejudicial errors by trial judges. In the case of Bo Zou, convicted of sexual assault in 2012, the appeal court overturned the conviction in 2017 after concluding the trial judge misapplied the law regarding corroboration of evidence. Christopher Michael Burr's 2014 murder conviction was quashed in 2015 because the trial judge failed to properly instruct the jury on self-defence. The discovery of new evidence is a powerful ground for appeal, particularly with advancements in forensic science. DNA testing has exonerated individuals like David Milgaard, Gregory Parsons, and Chris McCullough. In Parsons' case, DNA testing excluded him as the killer of his mother, leading to an acquittal in 1998 after he had been convicted in 1994. The recantation of key witness testimony has also led to overturned convictions, as seen with Randy Druken, whose conviction was overturned after a jailhouse informant recanted. Arturo Sanchez had his 2015 conviction overturned in 2017 after an appeal panel found the trial judge made significant errors in assessing evidence. James Sauvé and Richard Trudel had their 1996 convictions overturned in 2004 after the longest trial in Canadian history at 16 months. Peter Chenier and George Farley had their 2001 convictions overturned in 2006 and were acquitted in 2008.

Compensation and Aftermath

There is no statutory entitlement to compensation for wrongful conviction in Canada. Awards are discretionary and negotiated on a case-by-case basis. Compensation amounts vary widely. Steven Truscott received $6.5 million in 2008. David Milgaard was awarded $10 million in 1999. Randy Druken was awarded $2.1 million in 2006. Thomas Sophonow received $2.6 million in 2000. Benoit Proulx received $1.1 million in 2001. Donald Marshall Jr. received $1.5 million in 1990. Réjean Hinse received $13.1 million in 2011, the largest wrongful conviction award in Canadian history. Ivan Henry was awarded $8 million in 2021 for 27 years in prison. The aftermath of exoneration often involves significant personal challenges, including reintegration into society. Timothy Houlahan died by suicide after his release. Glen Assoun died in 2023. Robert Mailman died in 2025 and Walter Gillespie died in 2024, both shortly after their 2024 exonerations. The lack of a standardized compensation framework means outcomes for exonerees are inconsistent. Some exonerees, like Gary Staples who was acquitted in 1972, received undisclosed compensation in 2002. Gordon Folland received undisclosed compensation in 2006 after his 1995 conviction was overturned in 1999.

Systemic Issues and Reform Efforts

Analyses of wrongful conviction cases have identified recurring systemic issues within Canada's justice system. These include tunnel vision, where police and prosecutors focus on a single suspect while ignoring contrary evidence. Eyewitness misidentification remains a leading cause, as seen in cases like Leighton Hay, where a witness gave an 80 percent estimate of accuracy. Flawed forensic science, exemplified by the Charles Smith scandal, and the use of unreliable jailhouse informants have also contributed. Societal biases, including racism against Indigenous people highlighted in the Donald Marshall Jr. case, can infect investigative and judicial processes. The Martensville satanic sex scandal in 1992 involved wrongful prosecutions based on emotional hysteria, leading to a $924,000 settlement in 2004. In response, reform efforts have been ongoing. Innocence Canada advocates for policy changes. The federal government's move to create an independent miscarriage of justice review commission via Bill C-40 aims to depoliticize the conviction review process. Public inquiries have led to recommendations for improving police standards and addressing racial discrimination. The 2003 inquiry into Randy Druken's case examined several wrongful convictions in Newfoundland. The 2025 case of Brandon Klayme, acquitted in 2026 after a mistaken identity in an online grooming case, highlights ongoing vulnerabilities with digital evidence. The inquiry into the murder of Gail Miller led to systemic changes in Saskatchewan.

Questions about Overturned convictions in Canada

What is the process to overturn a wrongful conviction in Canada?

Individuals can appeal their conviction to the provincial or territorial court of appeal, arguing there was a legal error or new evidence. If appeals are exhausted, one can apply for a criminal conviction review by the federal Minister of Justice under the Criminal Code. The Minister can order a new trial or refer the case back to an appeal court. Bill C-40, proposed in 2023, would establish an independent commission to handle these reviews. The Minister's power includes considering any relevant matter under the 2002 amendments.

Does the Canadian government compensate people who are wrongly convicted?

Canada does not have a legislated right to compensation for wrongful conviction. Compensation is discretionary and negotiated individually. Amounts vary, such as $6.5 million for Steven Truscott, $10 million for David Milgaard, and $13.1 million for Réjean Hinse. The lack of a standard framework leads to inconsistent outcomes. Some provinces, like Ontario, have provided settlements such as $4.25 million to William Mullins-Johnson.

Who was Dr. Charles Smith and how did he affect wrongful convictions?

Dr. Charles Smith was a forensic pathologist in Ontario whose flawed autopsy analyses and expert testimony in cases of child deaths led to several wrongful convictions. His work was central to convictions later overturned for individuals like Sherry Sherrett-Robinson, Tammy Marquardt, and Maria Shepherd. A public inquiry found serious errors and systemic failures, leading to recommendations for reform. His errors affected several cases.

What is Innocence Canada and what does it do?

Innocence Canada is a non-profit organization dedicated to exonerating individuals convicted of crimes they did not commit. It reviews potential wrongful conviction cases, investigates new evidence, and pursues legal avenues such as appeals or ministerial reviews. The organization also works to prevent future injustices through education and advocacy. It has been involved in cases like those of David Milgaard and Guy Paul Morin.

What is the significance of the Donald Marshall Jr. case?

The wrongful conviction of Donald Marshall Jr. is significant for exposing systemic racism and incompetence within the justice system of Nova Scotia. He was convicted in 1971 for a murder he did not commit and spent 11 years in prison before being acquitted by the Nova Scotia Court of Appeal in 1983. A royal commission inquiry into the case concluded that racial bias against Marshall, who was a Mi'kmaq man, and a failure by police and prosecutors to properly investigate the crime led to the miscarriage of justice. The inquiry's recommendations contributed to broader discussions and reforms concerning the treatment of Indigenous people within the Canadian legal system.

What are common causes of wrongful convictions in Canada?

Common causes include eyewitness misidentification, false confessions, flawed forensic evidence, tunnel vision, and the use of unreliable jailhouse informants. The Charles Smith scandal involved flawed forensic pathology. Cases like Leighton Hay involved eyewitness misidentification. Randy Druken's case involved a recanted jailhouse informant. The Martensville scandal involved wrongful prosecutions based on hysteria.

Sources and further reading

• Overturned convictions in Canada (Wikipedia)
• The Canadian Registry of Wrongful Convictions (wrongfulconvictions.ca)
• Notable Wrongful Convictions in Canada (thecanadianencyclopedia.ca)
• Criminal Conviction Review (justice.gc.ca)
• Innocence Canada: Home (innocencecanada.com)

Checked by the Nosy Mag desk. Last updated 2026-10-28.