There is a law in some states, like Idaho, where in lieu of taking their sick child to the hospital for proper medical treatment... the parents can pray to God for medical care...
and... if/when the child dies from their cancer (or other disease), the parents are immune from prosecution for things like "child abuse", "negligent homicide", "murder", etc...
That's pretty sick... religions are so twisted...
reference,
Idaho Republicans Defend 'Faith-Healing' Parents Who Watch Kids Die