An investigative review finds risk of sudden infant death while sleeping doubles in households monitored by state social workers, reports The Boston Globe.

As Andrea LaVigne of Grafton lay in bed with her baby, 1-month-old Aliana’s heart stopped. Half the child’s face was covered with a blanket, and she was born drug-dependent.

Three months after her baby girl’s death, Andrea LaVigne of Grafton says she still doesn’t know what caused her 1-month-old’s heart to stop while they lay in bed together, a blanket half-covering the child’s face.