A criminal enquiry has been launched in France after a six-year-old boy ‘left to roam around a maternity unit’ allegedly killed a newborn baby. A baby identified as Zayneb-Cassandra, who was born premature to a 23-year-old woman earlier this month, suffered a traumatic brain injury last Friday after the boy "treated her like a doll" and dropped her on the floor of the Jeanne-de-Flandre Children’s Hospital in Lille. The boy had already been reported as a ‘disruptive presence’ in the hospital