It uses informants from the local population in order to gather intelligence about planned attacks or about the location of terrorist leaders.

The agency said the force would use undercover officers, decoys and informants to pursue carjackers.

It might also suggest ways to pursue a case without using informants.

Except for a few personal contacts, she didn't use informants and stayed clear of places she would be recognized.

This scrutiny not only resulted in raids on his home, but law enforcement has also used confidential informants to monitor Young.

In the past the Commission has used informants to good effect.

Criminal intelligence is developed by using surveillance, informants, interrogation, and research, or may be just picked up on the "street" by individual police officers.

Agents accomplished this by developing leads and using informants which were considered by many to be innovative investigative techniques at the time.

We don't use informants, and we don't do investigative reporting.

A U.S. intelligence official said the danger of using informants would be inherent but unavoidable.