Gevurot Meyruach Hakodesh 25:6-7

And having stayed with them no more than shmonah or asarah yamim, Festus went down to Caesarea; the next day he sat on the Kes HaMishpat and ordered Rav Sha'ul to be brought in. When Rav Sha'ul came in, the Judeans who had come down from Yerushalayim stood around him and brought serious charges keneged (against) him, which they were not able to prove.