Remember those hungry fellows who promised not to eat until they ambushed Paul? We read about them in Acts 23:12, When it was day, the Jews made a plot and bound themselves by an oath neither to eat nor drink until they had killed Paul. It didn't work. Why? Because a string of unlikely events happened, events that they were not expecting.
A boy overheard the plot.
The boy had the courage to go to the Roman centurion guarding Paul.
The centurion took him seriously and brought him to the Trib