Authorities found a household substance in an inmate’s cell at Anamosa State Penitentiary over the weekend that could be used to make explosives. The trial of the man accused of killing Iowa college student Mollie Tibbetts in 2018 could conclude as soon as this week. Plus, IPR’s Natalie Krebs explains that University of Iowa researchers are working with a local non-profit to figure out the best way to gather and communicate health information to the state’s 7,000 migrant workers.