Festus asked King Agrippa to tell him what to write to Caesar about Paul.

Acts 25:23-27

23 The next day Agrippa and Bernice came very ceremoniously to the assembly hall. Some Roman commanders and prominent men in Caesarea came with them. Then, Festus told an officer to bring Paul. So after the officer went to the prison and brought him, 24 Festus said, “King Agrippa, and all the rest of you who are here, you see this man. Many [HYP] Jews in Jerusalem and also those here in Caesarea appealed to me, screaming that we (exc) should not let him live any longer. 25 But when I asked them to tell me what he had done, and they told me, I found out that he had not done anything for which he should be executed {anyone should execute him}. However, he has asked that our emperor should judge his case, so I have decided to send him to Rome. 26 But I do not know what specifically I should write to the emperor concerning him. That is why I have brought him here. I want you all to hear him speak, and I especially want you (sg), King Agrippa, to hear him. Then, after we (inc) have questioned him, I may know what I should write to the emperor about him. 27 It seems to me that it would be unreasonable to send a prisoner to the emperor in Rome without my specifying the things about which people are accusing him.”