After reading this I felt scared for the child as he/she was clearly misunderstanding the reason behind his removal. It was not her/his fault at all.
Why couldn’t the worker and the policeman explain to him/her on the way to the resource home that s/he would be spending time at this new place until his parents could take better care of him. Someone could remind him that s/he didn’t do anything wrong and talking to the lady at the daycare was the right thing to do. Also reminding him/her that her/his parents still love him and hopefully soon S/he can see them.