Christine Hofisi, 21, from Chipinge near the Mozambique border, is accused of strangling the 18-month-old child before removing his left ear.
Detectives believe that the boy’s ear was sold for $20 to a healer over the border known as Maheza.
He is currently on the run, having been arrested on suspicion of carrying out a series of ritual murders following the discovery of 11 human skulls at his home.
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