To ensure absolute certainty, especially after the car door handle sample showed a second DNA profile, investigators conducted a 'dumpster dive' to collect Joseph DeAngelo's garbage. From this, a piece of tissue yielded a single-source DNA profile that 100% matched the Golden State Killer's, providing irrefutable evidence for the arrest and prosecution.
Impact: High. This meticulous second verification underscores the commitment to accuracy in high-stakes investigations. It highlights the lengths to which law enforcement will go to secure undeniable proof, ensuring justice for victims.
In the source video, this keypoint occurs from 03:22:49 to 03:24:16.
Sources in support: Megyn Kelly (Host), Michelle McNamara (True Crime Blogger/Author)

