In Idaho, parents who say their faith prohibits lifesaving medical care for their children can’t be charged with child neglect or manslaughter. Supporters of this protection over the years have included lawmakers who voiced support for “traditional” Idaho values.

But from at least the 1880s through the early 1970s, it was illegal for parents in Idaho to choose prayer over medical care when a child’s life was at stake, newspaper archives and historical documents show.