But many in the industry doubt that even the most vigilant compliance officers and computers can catch every abuse.

Many times, he said, visitors were upset because pickpockets would work in groups to distract even the most vigilant person.

Meanwhile he bent the most vigilant attention towards the object before him.

But piracy is so profitable that it seems to defy even the most vigilant efforts.

Something has broken in the men who should be the most vigilant caretakers of the community's children.

But even the most vigilant window-gazer cannot look into his own building.

Let's face it: by the time even the most vigilant consumer discovers his information has been used fraudulently, it's already too late.

It happened in the dead of night, when even the most vigilant nurse might be forgiven for sleeping.

Yet it is the youngsters themselves who are the most vigilant.

Yet there was a subtle shift occurring that escaped all but the most vigilant.