10.08.2026

"20-Year Cold Case Solved: DNA Leads to Arrest"

It’s taken Toronto Police more than 20 years to charge a suspect in the murder of Patrick Santos, a 21-year-old Scarborough, Ont

It has taken the Toronto Police over two decades to file charges against a suspect in the notorious murder case of Patrick Santos, a 21-year-old resident of Scarborough, Ontario. The young man was discovered in his home in 2006, bound with zip ties and duct tape, leading to a grim investigation that remained unresolved for many years.

Recently, advancements in investigative genetic genealogy have led to a breakthrough in the case. DNA samples obtained from the crime scene were analyzed and matched to those of Pierre O’Connor, a Hamilton man who, notably, had no previous criminal record. This significant development marks a key turning point in a case that had stumped law enforcement for over 20 years.

The complexities of this long-standing cold case were explored in depth by host Maria Kestane, who spoke with Fil Martino, the co-host of the podcast Tracking a Killer. The discussion delved into the intricate details of how investigative techniques, particularly genetic genealogy, are reshaping the landscape of forensic science and cold case resolution.

In addition to the discussions surrounding the case, Kestane was also joined by Steen Hartsen, a faculty member from the British Columbia Institute of Technology. Hartsen provided valuable insights into genetic genealogy, elaborating on its processes and potential ethical implications. The incorporation of genetic information from databases raises discussions on privacy concerns and the moral responsibilities that come with such investigative tools.

The use of genetic genealogy has garnered attention for its ability to link suspects to unsolved crimes much more efficiently than traditional methods. However, as Hartsen pointed out, the ethical risks must be carefully navigated to avoid potential breaches of privacy for individuals whose genetic information may be analyzed without their consent.

The discussion emphasized the importance of balancing technological advancement in crime-solving with the respect for individual rights. With the resolution of cases like Patrick Santos’s murder, the law enforcement community is cautiously optimistic about the future of using such methods. The intersection of science and ethics in criminal investigations continues to be a hot topic as groundbreaking techniques evolve.

For those interested in following more about true crime and cold cases, the episode of Tracking a Killer that features this discussion is available for listening. The podcast provides deeper insights into the use of innovative investigative techniques and chronicling unsolved cases like that of Patrick Santos.

Moreover, listeners can subscribe to The Big Story podcast on platforms like Apple Podcasts and Spotify for comprehensive coverage of current events and investigative stories that delve into pressing societal issues.