The police detected a pattern after the fourth attack, he said.

"Could traces of such a field be detected after the fact?"

The images are often only detected after the students themselves start bragging about it.

For a moment, he froze, wondering if his presence had been detected after all.

And pointed questions are being asked about a department that could not detect potentially illegal activity until well after the fact.

Instead, the food industry is emphasizing security measures to prevent attacks rather than detect them after the fact.

Down syndrome usually can be detected during pregnancy or soon after birth.

The new experimental test can frequently, though not always, detect the infection soon after birth.

In some places, a foul odor was detected for several hours after the explosion.

No resistant strains could be detected after such therapy, the scientists reported.