Thanks folks. RAICES is handling the legal end which I am obviously not equipped to help with.
My understanding is that there is no mechanism to match parents with children, and in many cases, facilities housing the children don’t know which children came with parents, and which children are unaccompanied minors. There are also parents who have already been deported without their children.
It would seem to me that help is needed on both ends, even if it means taking photographs and creating photo arrays.
@katliamom, I live in Boston.