Suchen thought of Walter wandering the strange town, searching for a friendly face on a restaurant patio or a hotel balcony, and tried to convince herself that she had agreed to the coffee because of the helplessness that an old man could not erase from his face.

NEWYORKER: Alone

Instead of simply assessing our familiarity with a suspect's face, we begin searching for clues and guidance.

WSJ: Jonah Lehrer on Memory, Witnesses and Crime | Head Case