DUBUQUE — Authorities have arrested two more people in connection with an April home invasion and killing of a northeast Iowa man. U.S. Marshals arrested 30-year-old Eric D. Campbell in the Chicago area on Tuesday on first-degree murder and first-degree robbery charges. Calumet, Illinois police arrested 30-year-old Savanna R. Stotlar on a warrant for second-degree robbery. Both were charged in connection with the robbery and shooting death of 21-year-old Collin A. Brown.