The state has rested its case against Cristhian Bahena Rivera, who faces a first degree murder charge in the killing of Mollie Tibbetts. IPR’s Kate Payne says prosecutors have worked to clear other men who were investigated for any connections to her death. The first Democrat has announced his candidacy to run for U.S. Senate in Iowa in 2022. Dave Muhlbauer is a former Crawford County supervisor who raises cattle and hogs on a farm near Manilla. Republican Sen. Chuck Grassley has not said whether he’ll seek an eighth term. Plus, the city of Des Moines will hire a third party to run its future de-escalation training sessions.