Once a DNA profile was obtained, the genealogical process involved identifying potential relatives by searching databases like Ancestry.com and 23andMe. The closest relatives found were third cousins, indicating a common ancestor born in the 1840s. This required building extensive family trees to trace descendants, narrowing down the suspect pool by focusing on males born between 1940-1960 with a California connection, a process described as 'investigation 101'.
Impact: High. This illustrates the painstaking, complex nature of genealogical investigation. It reveals how a vast, historical family tree can be meticulously mapped to pinpoint a modern-day suspect, demonstrating the power of combining historical records with genetic data.
In the source video, this keypoint occurs from 03:10:42 to 03:13:10.
Sources in support: Megyn Kelly (Host), Bonnie (Ex-fiancée of D'Angelo)

