Christine Irwin, the mother of homicide victim Kamisha Nyvold, speaks at the 2026 MMIP Conference in Rapid City, South Dakota. (Photo by Amelia Schafer/ICT)RAPID CITY — It took 30 years for a second-degree murder conviction in the death of 23-month-old Kamisha Nyvold, Sisseton Wahpeton Dakota. What her family didn’t know is that 25 years prior, they’d lost their chance to seek the justice they wanted. For all deaths on federal land, which includ…