The introduction of autosomal DNA testing, particularly through companies like 23andMe, revolutionized genealogy by allowing individuals to explore all branches of their family tree, not just direct paternal or maternal lines. This type of DNA, inherited from both parents, provided a much richer dataset for identifying relatives and, crucially, for investigative genetic genealogy.
Impact: High. This technological leap significantly expanded the scope of genetic genealogy, enabling the identification of closer relatives and making it a far more powerful tool for uncovering familial connections relevant to criminal investigations.
In the source video, this keypoint occurs from 00:15:18 to 00:24:17.
Sources in support: CeCe Moore (Genetic Genealogist)

