They brought Paul into that room, then the Jewish leaders from Jerusalem stood up and blamed him. They told Festus, “Paul did a lot of bad things.” But they couldn’t show him that their story was true.
Tell them clearly, and respect them as you talk to them. Make sure you always live the right way, so you don’t feel shame. Some people rubbish Christians, but if they see you doing the right things, they will feel shame about themselves.