When 18-year-old Ruth Cruger disappeared in 1917, newspapers reported that she probably ran off with a boyfriend. New York police said that there were no clues to go on. But an investigator named Grace Humiston decided that she would do whatever it took to find her. She became known as "Mrs. Sherlock Holmes." Brad Ricca's book is Mrs. Sherlock Holmes: The True Story of New York City's Greatest Female Detective and the 1917 Missing Girl Case That Captivated a Nation. Criminal is a proud member of Radiotopia from PRX. If you haven't already, please review us on iTunes! It's an important way to help new listeners discover the show: iTunes.com/CriminalShow. Say hello on Twitter, Facebook and Instagram. Sign up for The Accomplice If you'd like to introduce friends or family members to podcasts, we created a How to Listen guide based on frequently asked questions. Artwork by Julienne Alexander. Sponsors: Betterhelp Get 10% off your first month with discount code CRIMINAL when you fill out a questionnaire at betterhelp.com/criminal Casper Get $100 toward select mattresses by visiting Casper.com/criminal and using criminal at checkout. Terms and conditions apply. Native Deodorant For 20% off your first purchase, visit nativedeodorant.com and use promo code CRIMINAL during checkout. The Real Real Shop in-store, online, or download the app, and get 20% off select items with the promo code REAL. Simplisafe Protect your home today and get free shipping at SimpliSafe.com/CRIMINAL Squarespace Try Squarespace.com/criminal for a free trial and when you’re ready to launch, use the offer code CRIMINAL to save 10% off your first purchase of a website or domain. Vistaprint Go to vistaprint.com and enter promo code CRIMINAL for free shipping on all business cards, any style, any quantity. Zola  to start your free wedding website wand also get $50 registry on Zola, go to zola.com/criminal