the normal common-sense assumptions, verbal cues, body language, and so on that we use to size up other people and make instant judgments about them often don’t apply to sociopaths. With Ed Kemper, for instance, stopping for a pretty hitchhiker was his most important priority, and he had thought long, hard, and analytically about how best to accomplish his objective; much longer, harder, and more analytically than a young woman encountering him casually would have done from her perspective.
