A great deal of infrastructure was also necessary—roads, waterworks, food delivery, fortifications—were necessary to support Herod's ambitions building program.
Festus must have felt a huge wave of relief, knowing Agrippa and Berenice could give him the full story, tightly knit as they were with Felix and Drusilla. It made all the sense in the world for him to wait just a few days for their arrival, then have them help him adjudicate what was to be done with Paul.
Felix was well-known for the corruption and cruelty in his administration. His penchant for bribes led to an increase in crime during his rule, yet his response to ensuing feuds and uprisings was swift and tyrannical.
When we pray “God, please get me through this suffering” He will actually walk with us through the pain and get us to the other side.
It’s crazy how things work out though, isn’t it! Randomly (or was it?), Paul’s nephew caught wind of their nefarious plan, and got word into the tribune, who kept it on the downlow, fully intent on protecting Paul.