What relation are you to the child and under what condition has the child been living with you ?

Agree with Califdad - need more info. Depends on circumstances such as whether the parents surrendered the child, were permanently stripped of their rights by a legal authority, things of that nature. If the child was born and you "simply" brought the child to live with you it becomes more complicated.

Are you a parent, a grandparent, a friend ?

If not a parent, where are the parents