In care
Definition 1 of 2
Pro Tip 1/3Child Welfare Context
Used when children are under the protection of social services, often due to family issues. 
She has been in care since she was five.
Pro Tip 2/3Legal Implications
Refers to formal legal status, indicating child protection services involvement. 
The court decided that the child should be placed in care.
Pro Tip 3/3Temporary Situation
Often implies a temporary arrangement, although the duration can vary. 
Until the parents resolve their issues, the siblings will remain in care.