Albert Barnes Commentary Acts 25:8

"while Paul said in his defense, Neither against the law of the Jews, nor against the temple, nor against Caesar, have I sinned at all." — Acts 25:8 (ASV)

While he answered, etc. See this answer more at length in Acts 24:10-21. As the accusations against him were the same now as then, he made to them the same reply.

"For himself," "made his defense."