、。
A capable FBI agent carries out his duty without hesitation.
Literal
Capable-[attributive-な] federal-investigation-bureau-official [topic-は] hesitation do-[nominal-こと] without, own duty [object-を] execute.
Elaborate formal language. 連邦捜査局 ('FBI,' literally 'federal investigation bureau') is one of those calqued compound translations of foreign institutions. ちゅうちょ ('hesitation') is written in hiragana here but more often in kanji (躊躇); it's a formal word for hesitation. ことなく ('without X-ing') is the negative nominalized form — 'without the thing of X.'