" Wouldn’t there be fingerprints? I mean, if someone did take the real jewel, they’d leave prints on the fake one, right?” No one spoke for a minute. Then Dr. Pitts smiled at Dink. “That’s an excellent idea,” he said. “And I think we should ask the police to look for fingerprints. They will, of course, find mine. But unless I miss my guess, no others.” “Why do you say that?” Ruth Rose asked. “Because, young lady,” Dr. Pitts said, “this thief was very clever. And clever thieves wear gloves.” Uncle Warren nodded at the phone. “Please call the police,” he told Dr. Pitts. “They will prove that Jean-Paul and James are innocent!” Dr. Pitts looked at Dink’s uncle. “Excuse me, sir, but there is another suspect.” “And who would that be?” Uncle Warren asked. “Yourself,” Dr. Pitts said quietly. "
― Ron Roy , The Jaguar's Jewel (A to Z Mysteries, #10)