The AD33 crucifixion detail in Judea

[Maximio]

Plus wasn't it a a special passover since it also fell on the sabbath?

Jay, presuming the narrative of the 4 gospels is complete and without any gaps in the timeline then Pesach would have begun on the Thursday evening, the accounts describe them sitting down to the feast (Seder) at that time. The trial/crucifiction occured on the friday (therefore the first full day of the festival). Shabat would have begun at dusk that evening i.e. the beginning of the second day of the festival. Pesach (Passover) is an eight day festival which means that there will always be at least one Shabat during it. The Priests would not have dared to move to try and ultimately execute someone on the Sabbath.
However your point about heightened security at this time is valid. The conflict between the various factions in Judah at that time especially in Jerusalem would mean that the Romans would be acutely aware of the potential for trouble when killing someone they saw as a populist radical and a Galilean one to boot. I don't see any problem with the idea that a senior officer was sent out to oversee the business. Even if there wasn't likely to be a rescue attempt there was bound to be a few stones thrown between the various different supporters. You would want to have a steady hand in those circumstances.