You would have to go back a lot of centuries to find a case anything like this.
Anyone, never mind a child, killed by violent acts of exorcism.

This death results from beliefs current in parts of Africa.
All the people involved are from Africa.
Those beliefs predate the arrival of Christianity to Africa.
They were certainly not brought to Africa by Christian missionaries.

The beliefs have been bolted on to Christianity in the same way some Pagan rituals have become part of Western Christianity (mistletoe, holly, Easter eggs, equinoctial and solstice festivals).