After Paul Holes retired, surveillance on Joseph DeAngelo led to an undercover agent swabbing his car door handle at a Hobby Lobby. The DNA results from this sample showed a significant match to the Golden State Killer's profile, with 21 markers aligning. This crucial evidence, despite a secondary DNA profile also being present, confirmed DeAngelo as the prime suspect, leading to the decision to pursue an arrest.
Impact: High. This represents the critical breakthrough that finally linked Joseph DeAngelo to the Golden State Killer. It demonstrates how even seemingly minor evidence, like a car door handle swab, can yield definitive results when combined with advanced DNA analysis.
In the source video, this keypoint occurs from 03:18:26 to 03:20:05.
Sources in support: Megyn Kelly (Host), Nick Willick (Former Police Chief)

