They brought none accusation of such things as I supposed - It was natural for Festus, at the first view of things, to suppose that Paul must be guilty of some very atrocious crime. When he found that he had been twice snatched from the hands of the Jews; that he had been brought to Caesarea, as a prisoner, two years before; that he had been tried once before the Sanhedrin, and once before the governor of the province; that he had now lain two years in bonds; and that the high priest and all the heads of the Jewish nation had united in accusing him, and whose condemnation they loudly demanded; when, I say, he considered all this, it was natural for him to suppose the apostle to be some flagitious wretch; but when he had tried the case, and heard their accusations and his defense, how surprised was he to find that scarcely any thing that amounted to a crime was laid to his charge; and that nothing that was laid to his charge could be proved!

Acts 25:17 "So after they had assembled here, I did not delay, but on the next day took my seat on the tribunal and ordered the man to be brought before me.

Acts 25:19 but they simply had some points of disagreement with him about their own religion and about a dead man, Jesus, whom Paul asserted to be alive.

Whether it is Lawful for the Accused to Escape Judgment by Appealing?
Objection 1: It would seem unlawful for the accused to escape judgment by appealing. The Apostle says (Rom. 13:1): "Let every soul be subject to the higher powers." Now the accused by appealing refuses to be subject to a higher power, viz. the judge. Therefore he commits a sin. Objection 2: Further, ordinary authority is more binding than that which we choose for ourselves. Now according to the Decretals (II, qu. vi, cap. A judicibus) it is unlawful to appeal from the judges chosen by common consent. …
Saint Thomas Aquinas—Summa Theologica

From Antioch to the Destruction of Jerusalem.
Acts 13-28 and all the rest of the New Testament except the epistles of John and Revelation. The Changed Situation. We have now come to a turning point in the whole situation. The center of work has shifted from Jerusalem to Antioch, the capital of the Greek province of Syria, the residence of the Roman governor of the province. We change from the study of the struggles of Christianity in the Jewish world to those it made among heathen people. We no longer study many and various persons and their …
Josiah Blake Tidwell—The Bible Period by Period

One Argument which Has Been Much Relied Upon but not More than Its Just Weight...
One argument which has been much relied upon (but not more than its just weight deserves) is the conformity of the facts occasionally mentioned or referred to in Scripture with the state of things in those times, as represented by foreign and independent accounts; which conformity proves, that the writers of the New Testament possessed a species of local knowledge which could belong only to an inhabitant of that country and to one living in that age. This argument, if well made out by examples, is …
William Paley—Evidences of Christianity