Six years ago, I spotted a guy in his late forties in a bookstore in New Jersey. He was buying books about offshore banking and a travel guide to Costa Rica. He paid with a credit card. Afterwards, when he sat down in the bookshop café, I decided to talk to him. “I bet you want to buy a condo in Costa Rica and bank your money in Belize,” I said. “But if you’re running from someone, you’d better avoid paying for those books with your credit card.” We talked for a while. Before I left, I gave him my business card. He was the first person I helped to disappear.