Albert Barnes Commentary Acts 25:18

"Concerning whom, when the accusers stood up, they brought no charge of such evil things as I supposed;" — Acts 25:18 (ASV)

No accusation, etc. No charge as I expected of a breach of the peace; of a violation of the Roman law; of atrocious crime. It was natural that Festus should suppose that they would accuse Paul of some such offense. He had been arraigned before Felix; had been two years in custody; and the Jews were exceedingly violent against him. All this, Festus would presume, must have arisen from some flagrant and open violation of the laws.