Tony da Costa Fernandes
(born c. 1943) served as the Foreign Minister of UNITA
, a rebel group in Angola
. In the 1990s Fernandes and UNITA Interior Minister General Miguel N'Zau Puna
allegedly uncovered the fact that UNITA leader Jonas Savimbi
ordered the assassinations of both Wilson dos Santos
, Angola's representative to Portugal, and Tito Chingunji
, one of Costa Fernandes' predecessors. Dos Santos and Chingunji's deaths and the defections of Fernandes and Puna weakened the U.S.-UNITA relationship and seriously harmed Savimbi's international reputation.