Policymakers across the country are spending hundreds of millions of dollars on “violence interruptor” programs to try to stop shootings before they happen. WBEZ’s Patrick Smith spent a year with some Chicago-based interruptors for the podcast “Motive.” This episode was produced by Miles Bryan, edited by Matt Collette, fact-checked by Laura Bullard, engineered by Paul Robert Mounsey, and hosted by Sean Rameswaram. Transcript at vox.com/todayexplained   Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts Learn more about your ad choices. Visit podcastchoices.com/adchoices