sentences:  Except for suits by incarcerated persons, non-prisoner litigants proceeding "in forma pauperis", or (in some circumstances) by seamen, U.S.Marshals no longer serve leading process or subpoenas in private civil actions filed in the U.S. district courts.Under the Federal Rules of Civil Procedure, process may be served by any U.S. citizen over the age of 18 who is not a party involved in the case.