Investigators have made/brought/leveled 'accusations' of corruption against a group of former officials.
There was a hint/tone of 'accusation' in his voice when he asked her where she had been.
He denied/rejected the 'accusation' that he had lied to the police.
(..) Well never mind. You've got the next best thing. Beg your pardon my lord, I know it's unorthodox But Mr. Holmes here has been making some serious accusations about you and The Order. I see. At least this solves the great mystery of how you became inspector. Excuse me, my lord. (..)2009 Sherlock Holmes