The arrest in the cold-case double-homicide of a B.C. couple has shone a spotlight on a new DNA technology that could help solve other cases.

The process, known as genetic genealogy, uses DNA testing to build and expand a family tree in conjunction with traditional genealogical records, such as census and vital records. 

The technology was used in the arrest of the Golden State killer earlier this month and appears to be increasingly used in criminal investigations. 

CeCe Moore is the genetic genealogist who helped authorities map and analyze the DNA evidence that resulted in the arrest Friday of William Earl Talbott II.

Talbott, 55, was arrested for the murders of Saanich,