“Children nowadays, they make maps. And say, this is the street where the store is that we're going to rob, and this is where we're going to hide, and this is how we get away.” In the 1950s, U.S. senators were worrying about “the fifth horseman of doom.” And they started an unusual investigation. The recordings of the Senate hearings in this episode are courtesy of the NYC Municipal Archives. Say hello on Twitter, Facebook, Instagram and TikTok. Sign up for our occasional newsletter, The Accomplice. Follow the show and review us on Apple Podcasts. Sign up for Criminal Plus to get behind-the-scenes bonus episodes of Criminal, ad-free listening of all of our shows, special merch deals, and more. We also make This is Love and Phoebe Reads a Mystery. Artwork by Julienne Alexander. Check out our online shop. Episode transcripts are posted on our website. Learn more about your ad choices. Visit podcastchoices.com/adchoices