Des Moines Register Bahena Rivera, 26, is charged with first-degree murder in the death of 20-year-old Tibbetts, whose July 2018 disappearance sparked a massive monthlong manhunt around her hometown of Brooklyn, Iowa, before her body was found concealed in a cornfield in southeast Poweshiek County. The state medical examiner described at least nine separate stab wounds found on her body, including one to the side of her head that penetrated her skull. Bahena Rivera pleaded not guilty, and after multiple delays , his trial began last week at the Scott County Courthouse in Davenport. Here are four key takeaways from his testimony Wednesday: