If an alien was found living in the USA, which government departments would get involved?

Question

If some how an alien baby was discovered living with a human family, in the USA, which government departments would take a visit to their house?

Answer 1

ICE CDC FBI  

Answer 2

Children's health & welfare, after all no sense in teaching the alien child how small minded humans can be.

Answer 3

A case for the Immigration and Naturalization Services department if EVER there was one.

Of course NASA, FAA, NSA, NSF, CIA, FBI, DHS, DOE not to mention DOD and after guys with guns show up who knows what happens.

Answer 4

You don´t have to worry about that because I am sure that you are not an alien.