Festus told the Jews to go and accuse Paul at Caesarea.

Acts 25:1-5

25 Festus, who was now the governor of the province, arrived in Caesarea, and three days later he went up to Jerusalem. 2 In Jerusalem, the chief priests and other Jewish leaders formally told Festus about the things that they said that Paul had done that were wrong. 3 They urgently asked Festus to do something for them. They asked him to command soldiers to bring Paul to Jerusalem, so that Festus could put him on trial there. But they were planning that some of them would hide near the road and wait for Paul and kill him when he was traveling to Jerusalem. 4 But Festus replied, “Paul is in Caesarea, and is being guarded {soldiers are guarding him} there. I myself will go down to Caesarea in a few days. 5 Choose some of your leaders to go there with me. While they are there, they can accuse Paul of the wrong things that you say that he has done.”