'Persecutor' in the Bible

They only heard it said, "He who was once our persecutor is now telling the Good News of the faith of which he formerly made havoc."

as to zeal, a persecutor of the Church; as to the righteousness which comes through Law, blameless.

though I was previously a blasphemer and a persecutor and had been insolent in outrage. Yet mercy was shown me, because I had acted ignorantly, not having as yet believed;