(AFRICAN EXAMINER) - The Department of State Services (DSS) yesterday told a Federal High Court (FHC) in Abuja that its preliminary investigation established that hostage negotiator, Tukur Mamu, is a terror sponsor. In an affidavit in support of its ex-parte motion marked FHC/ABJ/CS/1617/2022 and filed before the court, the DSS also described Mamu as a