The information Smith gave them, under the guise of being an anonymous tipster, was false.

Did they tell you anything about this anonymous tipster?

But representatives of the office said they had "multiple contacts" with the anonymous tipster, and "questioned him at length over the phone."

The key to his arrest had been information from an anonymous tipster.

Some anonymous tipster trying to help them out.

The two of them are working on a theory that your caller isn't an anonymous tipster, but the man himself.

Hence contacting the police as an anonymous tipster and getting us all into the game.

The anonymous tipster, he dragged us in for some purpose only he knows about.

When an anonymous tipster says that some other candidate has strayed, will a paper forget it?

An anonymous tipster called the police and claimed that someone was just shot with a silenced pistol.