Prosecutors said the child’s mother, Marie Lauradin, sprayed the child with rum and set her on fire in June 2009 to rid her daughter of evil spirits.
They said the 71-year-old grandmother later doused the girl with water and put her to bed without seeking medical help.
The judge told Thessier at the sentencing that the girl deserved to have her wounds treated.
The girl’s mother is set to go on trial on charges of assault and endangering the welfare of a child.
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