A: You should consult a local attorney about your custody options. It sounds like these kids will need a lot of support. If your question is whether or not you could get some form of custody, it is a possibility you can explore through the courts and/or the local Children & Youth agency. It is unlikely that you could take any of the children out of the country at this time. But there’s no harm in talking to a local family lawyer about it.
A: You should consult with a Maryland attorney. Although you live in Pennsylvania, Jurisdiction over children is governed by the residence of the child. Presumably, an attorney who is familiar with practice where you nephew resides can help you. A lot will depend on the children's services agency that is involved.