Idaho has the death penalty and uses it, however, Duncan took the girl across the country, so this will be a federal kidnapping case.
Did he? Shasta and her brother were taken from a residence in Cour D'Alene Idaho, and she was found in Cour D'Alene Idaho. Everything may well have taken place without anyone leaving the same town, let alone the state. No evidence there of an interstate connection...
the infowarrior