Decades of tips and investigations yielded charges against only two people. A combination of missed chances, narrow laws and prosecutors’ limited focus helps explain why. It was early evening on Saturday, July 6, 2019, when Jeffrey Epstein disembarked from a private plane for the final time. Federal agents were waiting at Teterboro Airport in New Jersey to arrest him. “Is this about sex trafficking?” Mr. Epstein asked... [1376 chars]