Joseph DeAngelo's career as a law enforcement officer, including his time as a sergeant, directly informed his criminal tactics. He leveraged his training and understanding of police procedures to avoid detection, employing strategies like wearing gloves and using verbal staging. His transition to more violent crimes, including murder, intensified after he lost his police job, suggesting a shift in his criminal fantasy and a reliance on his former authority.

Impact: High. DeAngelo's law enforcement background provided him with an insider's advantage, enabling him to evade capture for years. The loss of his badge appears to have been a catalyst for escalating his violence, demonstrating how his identity as an officer was intertwined with his predatory behavior.

In the source video, this keypoint occurs from 02:11:15 to 02:14:50.

Sources in support: Megyn Kelly (Host)