Historic Homicide Investigation - Brenda LeBlanc

Investigative Genetic Genealogy (IGG) is an advanced forensic investigative technique that combines DNA analysis with traditional genealogical research to help identify unknown human remains or, in some cases, assist in identifying potential suspects.

IGG is used when conventional investigative methods, including fingerprint comparisons, dental records, and searches of criminal DNA databases, have been unable to identify a person.

In this investigation, IGG was used to help identify previously unidentified human remains. It was not used to identify a suspect.

Investigators first develop a DNA profile from the unidentified human remains.

That profile is then analyzed by forensic genealogy specialists, who compare it against DNA profiles that individuals have voluntarily submitted to genealogy databases that permit law enforcement use for unidentified human remains and homicide investigations.

Potential biological relatives are identified, allowing genealogists to construct family trees and identify possible family connections.

Investigators then use traditional police investigative techniques, including reviewing historical records, conducting interviews, and obtaining additional DNA samples where appropriate, to confirm the individual's identity.

Despite extensive investigative efforts following the discovery of the remains in 2023, the victim's identity could not be established using conventional investigative methods.

In 2025, investigators turned to Investigative Genetic Genealogy, which ultimately led to the identification of the victim as Brenda Marie LeBlanc.

Traditional forensic DNA testing compares DNA against known reference samples or profiles contained within approved law enforcement databases.

Investigative Genetic Genealogy uses DNA to identify possible biological relatives through genealogy research when no direct comparison exists, helping investigators identify previously unknown individuals.

No.

IGG is typically reserved for complex investigations where traditional investigative methods have been exhausted. It is a specialized technique that requires significant forensic expertise and careful legal and ethical consideration.

No.

IGG is an investigative lead-generation tool. Any information developed through genealogical research must be independently verified using conventional investigative methods before conclusions are reached.

Identifying a victim is often a critical step in a homicide investigation.

Knowing who the victim was allows investigators to better understand their background, relationships, movements, and circumstances leading up to their death. This information can generate new investigative leads and assist detectives in determining what occurred.