It sounds as though the baby had a very traumatic brith, during which she suffered lack of oxygen to the brain for a lengthy period. But it doesn't sound as though the baby was actually declared dead at any point.
The doctors decided to cool her down to give her brain a chance to rest and recover.
The use of hypothermia as a treatment in the case of brain injury, has been happening for several years.
It is fantastic that it can help such tiny babies as well as children and adults.
But I honestly don't think that the doctors are claiming that freezing a stillborn baby will make it come back to life
and the title really wasn't very clear about that.