Newly released court documents have clarified the role of investigative genetic genealogy in the Byron Carr murder investigation. While police previously suggested the technology helped identify a suspect, the files reveal it was actually used to locate witnesses who provided the testimony necessary for an arrest in the 1988 killing of the 36-year-old teacher.

Uncovering witnesses through DNA

In the Byron Carr case, the technology did not lead directly to a perpetrator. Instead, it helped investigators track down individuals who could provide evidence regarding the crime. This breakthrough eventually led to the 2024 arrest of Todd Joseph Irving on charges of first-degree murder and interfering with human remains. However, those charges were later withdrawn by the Crown.

Read also Police DNA collection methods scrutinized in Byron Carr murder case

The science behind the breakthrough

Investigative genetic genealogy differs from traditional police databases like CODIS. It works by comparing crime scene DNA against genealogical databases to find distant relatives. By building family trees from these matches, investigators can narrow down identities. This method is becoming a vital tool for several reasons:

  • It can recover profiles from tiny or degraded samples like hair or skin cells.
  • It helps identify "Jane Does" who have remained unnamed for decades.
  • It provides leads in cases where traditional witness testimony has vanished.

A growing trend in North American cold cases

This approach is being used across the United States and Canada to breathe life into decades-old investigations. In Washington, forensic genome sequencing recently helped detectives charge 74-year-old David Tibbett for a 1986 murder. In Ohio, authorities are using similar methods to attempt to identify a woman found in a creek in 1975.

As laboratory techniques like single nucleotide polymorphism testing improve, more evidence from property rooms is being re-examined. These advancements are turning old, unreadable biological traces into actionable intelligence for law enforcement agencies working to resolve long-standing murders.