Seventeen years after a murder in Rosemont–La Petite-Patrie, Montreal police have solved the case. Cmdr. Mélanie Dupont announced at a news conference that genetic tools helped find the killer. The DNA from 2008 led to Jacques Bolduc being identified as the murderer in September 2025.
The search for answers started with DNA from 2008, which was hard to match. In 2021, new searches found relatives, and by late 2024, the trail was clear. In August 2025, DNA specialists confirmed Bolduc’s identity, bringing peace to Catherine Daviau’s family.
Bolduc died in 2021 at Archambault Institution, where he was serving a long sentence. Though he can’t be prosecuted, the police say the case is closed. News from CBC/Radio-Canada, Global News, and The Canadian Press highlighted this achievement in Rosemont–La Petite-Patrie.
This case is a breakthrough for Quebec’s forensic science. It shows how genetic genealogy can solve old cases. For Catherine Daviau’s family, it’s a victory after years of searching. It also sets a new standard for using science in justice, with care and respect.
Breaking development: Montreal cold case solved with genetic genealogy
In a measured Montreal police update, leaders explained how genetic genealogy found a suspect in the Catherine Daviau case. The SPVM press conference showed how they built from a 2008 DNA profile to a modern search. They balanced progress with respect for due process and the families affected.
Announcement by SPVM leadership at Montréal press conference
The Sept. 17, 2025 announcement was made by Cmdr. Mélanie Dupont and Cmdr. François Sauvé. They talked about linking evidence to Jacques Bolduc. They also mentioned working closely with the LSJML and following all rules.
LSJML director general Suzanne Marchand and DNA biology leader Diane Séguin explained the testing process. They started weekly checks in 2021 and confirmed the match in August 2025.
Why this marks a turning point for Quebec forensic science
Experts called it a Quebec forensic breakthrough. They moved from direct hits to finding distant relatives. This new method uses first-generation DNA and opens new paths when old files don’t work.
The LSJML teams refined this approach. It combines biology, statistics, and genealogy. It also makes teams work better together, improving how leads are checked.
How media coverage validated milestones and collaboration
Reports, including Canadian Press coverage, showed the team effort. They followed the case from the start to the end, keeping the public updated.
This coverage made the project’s progress and rules clear. It helped build trust as new methods were used.
| Milestone | Agency Leads | Method Focus | Public Signal |
|---|---|---|---|
| 2008 DNA profile creation | LSJML scientists | Short tandem repeat profiling | Baseline for later genealogy |
| 2018 renewed appeals | SPVM major crimes | Witness outreach and review | Community call for tips |
| 2021 genealogy launch | LSJML with SPVM | Distant‑relative matching checks | Shift toward family‑tree inference |
| Late‑2024 “interesting match” | LSJML kinship team | Tree building and triangulation | Validated lead for detectives |
| August 2025 confirmation | LSJML and SPVM | Cross‑reference and audit trail | Confirmed in a Montreal police update and Canadian Press coverage |
Catherine Daviau
Her story is told with care, using verified public records to honour her life. Family, friends, and neighbours remember her. This profile focuses on facts to understand her, while respecting her story.
Biography and background rooted in verified public records
The Catherine Daviau biography is based on confirmed police briefings and civic filings. She was 26 when she died on Dec. 11, 2008. Some reports said she was 27.
She lived in a 5th Avenue apartment in Rosemont–La Petite-Patrie. Her car was for sale online before her death.
Her work commute was a big part of her life. She worked on Montréal’s West Island for years. On Dec. 11, she left work around 4:30 p.m. and likely got home an hour later.
She called an acquaintance on her cell phone around 5:30 p.m. This detail is preserved in public records.
Life in Rosemont–La Petite-Patrie and a future cut short
As a victim in Rosemont–La Petite-Patrie, she lived near cafés and parks. Neighbours knew each other’s routines. Her story focuses on her character and daily life, not just her job.
Friends talked about her plans and small goals for the future. The profile highlights these plans, showing her last commute and evening calls. It also shows her sense of home.
Community remembrance and the importance of respectful storytelling
The community came together quietly. Vigils, appeals, and attention kept her memory alive. They emphasized respectful storytelling, sharing only verified details.
This approach helped the community grieve while seeking answers. It guided how to share details and remember her within Montreal’s victim profiles.
| Aspect | Verified Detail | Source Type | Relevance to Story |
|---|---|---|---|
| Age | 26 at time of death on Dec. 11, 2008 | Police briefings; civic filings | Anchors the Catherine Daviau biography in verified public records |
| Residence | 5th Avenue apartment, Rosemont–La Petite-Patrie | Municipal records; neighbour accounts | Places her within the Rosemont–La Petite-Patrie victim context |
| Work and commute | West Island employment; Highway 40 drive after 4:30 p.m. | Employer timeline; traffic logs | Builds a concise Montreal homicide victim profile of daily routine |
| Final communications | Cell phone use shortly after 5:30 p.m. | Telecom metadata | Supports respectful storytelling grounded in evidence |
| Online activity | Vehicle listed for sale days before death | Platform records; police notes | Provides context while maintaining privacy and accuracy |
From crime scene to clues: what happened in Rosemont–La Petite-Patrie
The evening in Rosemont–La Petite-Patrie turned chaotic quickly. First responders and investigators worked fast. They turned the scene into a map of leads.
Discovery at the 5th Avenue apartment on Dec. 11, 2008
A neighbour called 911 at 7:07 p.m. A Montreal fire team rushed to a 5th Avenue apartment. They found Catherine Daviau on her bed, showing signs of violence.
SPVM major crimes took over soon. The 5th Avenue apartment became key for a timeline and forensic work.
Locked doors, no forced entry, and implications for suspect access
When firefighters arrived, all exits were locked and there was no forced entry. This suggested a visitor who was let in or someone with access.
The bedroom was the main area of disruption. Other rooms were tidy. Investigators found a short time frame for the events in the Rosemont–La Petite-Patrie crime scene.
Fire set to destroy evidence and the preservation of male DNA
A fire was set to hide evidence. Yet, technicians managed to collect important swabs and textiles despite the heat and smoke.
Chain-of-custody rules were followed. Samples were logged and stored. Male DNA was found and later enhanced, thanks to the initial work after the fire.
Case timeline: 2008 to 2025 key moments and breakthroughs
The Catherine Daviau timeline shows how forensic work and new tech came together. It covers lab efforts, public appeals, and strategy changes. These kept the case alive, even with long waits.
2008 DNA profile created by LSJML with no immediate match
At the scene, a strong male DNA profile was found, known as the LSJML 2008 DNA profile. It was checked against the National DNA Data Bank of Canada. But, no match was found then.
This early finding set the stage for the Catherine Daviau timeline. It kept options open for future tests and kept the case alive in Montréal.
2018 appeals, 2020 court-ordered DNA delays, and 2021 setbacks
In 2018, the SPVM appeal brought new attention. It confirmed the DNA survived an arson attempt. Media coverage helped neighbors remember important details from Rosemont–La Petite-Patrie.
During the pandemic, a court order asked for a new DNA sample. But, a COVID DNA delay in 2020 slowed things down. The sample wasn’t added to the national bank, causing more uncertainty.
In 2021, Jacques Bolduc’s death at Archambault Institution 2021 was a turning point. His cremation ended the chance for a direct DNA sample. So, LSJML turned to genetic genealogy databases instead.
Late 2024 family-tree focus and August 2025 genealogical confirmation
By late 2024, analysts found distant relatives and built family trees. These trees pointed to a single branch. This work narrowed down possibilities and supported family connections.
With more matches and documented family lines, the lab prepared a report. It confirmed relationships. The August 2025 confirmation matched the LSJML 2008 DNA profile, ending a long wait in the Catherine Daviau timeline.
| Year | Milestone | Agency/Location | Impact on Inquiry |
|---|---|---|---|
| 2008 | Creation of LSJML 2008 DNA profile; no database match | LSJML, Montreal | Preserved high-quality evidence for future comparison and genealogy |
| 2018 | 2018 SPVM appeal confirms DNA endurance after arson | SPVM, Montreal | Renewed leads and media visibility to support tips |
| 2020 | Court-ordered sample affected by COVID DNA delay 2020 | Quebec courts; National DNA Data Bank | Sample not added; pushed investigators toward alternative methods |
| 2021 | Death of Jacques Bolduc at Archambault Institution 2021; cremation | Sainte‑Anne‑des‑Plaines | Ended direct sampling; triggered systematic genetic genealogy searches |
| Late 2024 | Family‑tree reconstruction from distant‑relative matches | LSJML genealogical unit | Narrowed focus to a specific lineage through documented kinship |
| August 2025 | August 2025 confirmation through kinship evidence | LSJML, SPVM | Corroborated relationships consistent with the original profile |
How genetic genealogy cracked the investigation
LSJML scientists took a new approach in genetic genealogy Canada. They used the 2008 male profile as a starting point, not a direct match. They looked for connections in public, consented data using kinship inference.
From database dead ends to distant-relative matches
When national databases were empty, analysts started checking again in 2021. They searched for distant-relative DNA matches found on consumer sites. They found clusters that suggested shared ancestors.
By comparing segment lengths and cM ranges, they guessed cousin levels. This method, used by 23andMe and Ancestry, helped without revealing identities. It also respected Canada’s privacy rules.
Cross-referencing family trees to narrow on Jacques Bolduc
When patterns emerged, teams did targeted family-tree analysis. They mapped common ancestors and tested groups. This built branches that could explain the shared DNA.
By linking public records to these branches, they found the Bolduc lineage by late 2024. They then used travel, residence, and history to focus on Jacques Bolduc. They tested the link with approved family samples.
Why LSJML leaders call the approach a “revolution”
Suzanne Marchand and Diane Séguin called it a forensic genealogy revolution. They said inference, not exact matches, led the way. This method combined 23andMe analytics, Ancestry tree work, and kinship inference under Quebec rules.
In August 2025, the method passed lab tests for genealogical confirmation. For many in Canadian forensics, it showed how genetic genealogy Canada can solve old cases. It does this by using distant-relative DNA matches and careful family-tree analysis.
The suspect identified: Jacques Bolduc and the path to closure
After months of work, investigators named Jacques Bolduc as the suspect. They used genetic genealogy and records to build a strong case. This led to a clear story of accountability in Montreal.
Dangerous offender status and death at Archambault Institution
In June 2020, courts labeled Jacques Bolduc a dangerous offender. He received an indeterminate sentence. His criminal history went back to 1979, with a spike in crimes in 2017.
He died of natural causes on September 8, 2021, at Archambault Institution. With his death, investigators used kinship analysis to confirm the case.
Online vehicle listing contact linking victim and suspect
An online ad contact linked the victim and Bolduc. He called after seeing a vehicle listing. They planned to meet on December 10, 2008, but he didn’t show up.
Detectives mapped his calls and movements. This evidence placed him at the scene on December 11, strengthening the case.
No prosecution possible and what “case closed” means
With Bolduc dead, there’s no prosecution. The SPVM closed the case in Montreal based on genetic genealogy and DNA evidence. They also had corroborated leads.
This closure shows the confidence in the evidence. It gives families answers and shows how cold cases can be solved without a trial.
| Element | Details | Relevance |
|---|---|---|
| Status | Designated dangerous offender in June 2020 | Explains indeterminate sentence and risk profile |
| Institution | Archambault Institution, Sainte-Anne-des-Plaines | Location of incarceration and death |
| Death | Natural causes on September 8, 2021 | Necessitated kinship-based confirmation |
| Initial Contact | Phone call via online classified ad contact about a vehicle | Links the victim and Jacques Bolduc without prior relationship |
| Legal Outcome | No prosecution due to death | Supports the SPVM decision to mark case closed Montreal |
Inside LSJML: Quebec’s forensic engine behind the breakthrough
At the heart of Montreal’s cold-case work is LSJML, Quebec’s forensic lab. It combines careful science with modern analytics. The team focused on preserving, testing, and verifying evidence until the truth came out.
Leaders like Suzanne Marchand and Diane Séguin talk about a culture that values precision and an unbroken audit trail.
Building and protecting the 2008 DNA profile
The lab created a male DNA profile 2008 from damaged material. They used validated reagents and kept detailed logs. Early checks against the National DNA Data Bank of Canada found no match.
They stored the DNA and digital records for future analysis. This plan included regular checks and logging every move. This created a continuous audit trail for later review.
Genealogical searches from 2021 and kinship modelling in 2024–2025
Starting in genealogy expansion 2021, LSJML searched databases with consent. Analysts built family trees and checked ages and locations against case notes.
With kinship modelling 2024–2025, they tested distant relationships. They used likelihood ratios to narrow down possibilities. This left a smaller set that matched public records and demographic data.
Quality controls, audit trails, and August 2025 confirmation
LSJML reduced error risk through replication, software updates, and peer review. Every decision was recorded for transparency. This included sample handling and algorithm settings.
In August, a report outlined the path to forensic confirmation 2025. It was supported by independent oversight and policy compliance. The confirmation relied on the DNA profile 2008, the lab’s governance, and expanded data from genealogy and kinship modelling.
Canadian context: privacy, policy, and momentum in cold cases
In Canada, families and detectives are finding new ways to solve old mysteries. New methods are being used, but with strict rules on data use and consent. This balance is key to moving forward in cold cases.
Lessons from earlier DNA resolutions such as Sharron Prior
The Sharron Prior DNA case in Longueuil showed how DNA can solve crimes years later. It gave police a clear guide on how to use DNA evidence. This guide helps them test theories without new evidence.
This case also showed the power of family trees in solving crimes. It helped other cold cases in Canada, where DNA and careful records are essential.
Public databases, consent, and evolving legal frameworks
Today, forensic teams use public genealogy data with court permission. They follow strict privacy and DNA laws. This includes getting approval for each case and keeping records.
As laws get clearer, a strong policy for forensic genealogy is forming. It focuses on being open with families, keeping data short-term, and explaining how DNA helps solve crimes.
What this means for future investigations across Canada
With proven methods, Canada is making progress in solving cold cases. Teams are using new ways to find leads, all while respecting privacy laws.
But, there are challenges. They need good evidence, skilled analysts, and work together across provinces. Thanks to the Sharron Prior case and strict policies, Canada can tackle cold cases with care and purpose.
Conclusion
The Montreal cold case resolution in the homicide of Catherine Daviau is a testament to the power of patience and new science. The case began with a 911 call at 7:07 p.m. on December 11, 2008. Investigators found no forced entry, an arson attempt, and a DNA profile.
Thanks to the SPVM and LSJML, this evidence remained key for years. It survived appeals, COVID delays, and the death of Jacques Bolduc in 2021. By late 2024, leads emerged, and in August 2025, the case was solved.
This success marks a major milestone in Quebec’s forensic history. LSJML leaders call genetic genealogy a revolution. It was this method that cracked the case, using family trees and kinship checks.
The suspect had a history of crime, dating back to 1979. He had also contacted Daviau online before the murder. The SPVM announced the breakthrough on September 17, 2025.
This case shows the importance of careful progress. The resolution proves that privacy-aware methods can lead to justice. It sets a new standard for future investigations.
Quebec now has a model that combines rigor with empathy. The Catherine Daviau case not only brought closure to loved ones. It also shows a new way for investigators across Canada to find truth through science.
This path, built in Montreal, is based on facts, partnership, and justice. It’s a durable shift that will guide future investigations.
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