An investigator of the Los Angeles County District Attorney's Office was at a loss for words due to the unexpected development in the case.
(「ロス疑惑」の捜査を担当した）ロサンゼルス郡検事局の捜査官は、事件の予想外の展開に言葉を失った。
◆be at a loss ： be at a loss for wordsで「言葉に詰まる」
An investigator of the Los Angeles County District Attorney's Office was at a loss for words due to the unexpected development in the case.
(「ロス疑惑」の捜査を担当した）ロサンゼルス郡検事局の捜査官は、事件の予想外の展開に言葉を失った。
◆be at a loss ： be at a loss for wordsで「言葉に詰まる」