A Harvard Law professor who teaches a class on judgment wouldnÂ’t seem like an obvious mark, would he? It was just supposed to have been a quick Saturday-morning errand to buy picture hooks. On March 7, 2015, Harvard Law professor Bruce Hay, then 52, was in Tags Hardware in Cambridge, Massachusetts, near his home, when a young woman with long reddish-brown hair approached him to ask where she could find batteries. It was still very much winter, and, once the woman got his attention, he saw that underneath her dark woolen coat and perfectly tied scarf she was wearing a...