The U.S. Supreme Court has rejected an appeal from convicted Idaho multiple murderer John Delling, challenging the lack of an insanity defense in Idaho. Idaho is one of four states that doesn't permit defendants to claim they're not guilty by reason of insanity. Three justices dissented; Justices Stephen Breyer, Ruth Bader Ginsburg and Sonia Sotomayor wanted to hear the case/Betsy Russell, Eye on Boise. More here.

Question: Should Idaho allow an insanity defense in cases like this?