The American stepfather brings his new wife and her son to the US. He begins paperwork to adopt his stepson but the process has not been finalized when both the boy's mother and stepfather are killed suddenly. As a minor with no known family in the US, he is taken into the custody of the state children's welfare service.
Now here's what I don't know: as the boy was not adopted by his stepfather, he does not hold US citizenship. As his mother was not a German citizen, he does not hold German citizenship*. He IS a Turkish citizen by right of blood**, but has never been to Turkey and has no immediate family living there anymore. So what is the procedure with a case like this? Would the boy be put into foster care anyway, or would the social workers or whoever actually try to track down some long-lost family members in Germany and Turkey?
* German law states that those born after January 1, 1975 are Germans if the mother or father is a German citizen.
** Article 66 of the Turkish Constitution: "The child of a Turkish father or a Turkish mother is a Turk."