How can I find someone who is locked up in jail but not as a city inmate as a federal inmate?

The federal inmate locator does not have the inmate's location if it is not one of their facilities. The bop.gov website lists all federal inmates, but if they are NOT IN BOP CUSTODY, it means that they are in a county or city jail awaiting a court appearance. Try vinelink.com, they have a very good inmate locator