In the night from Tuesday to Wednesday, a 3 and a half years remained alone at his home in Chantepie, near Rennes.
Supported by the juvenile, the boy is healthy. Prosecutors in Rennes decided to entrust to her maternal grandmother under a care order.
The mother, drunk, which was presented to the police, spent part of the day in custody for neglect of a child.
She is the subject of a criminal law and will follow a citizenship course.