Acts 23:18
So he took him, and brought him to the chief captain, and said, Paul the prisoner called me unto him, and prayed me to bring this young man unto thee, who hath something to say unto thee. So he took him, and brought him to the chief captain, and said, Paul the prisoner called me unto him, and prayed me to bring this young man unto thee, who hath something to say unto thee.
The centurion honored the request Paul made even though Paul was held as a prisoner. He took the young man, who was Paul's nephew, and brought him to the chief captain. In presenting him, he explained that Paul had asked for the youth to be brought because he had important information to report. That handoff brought the plot to kill Paul into the open, and through that timely warning God protected Paul's life.