He was following the pattern of a confidential source, coming in person rather than leaving a possible phone record.

That person said the documents, which were part of a lawsuit but had not been made public, came from a confidential source.

It came from a confidential source which I can't reveal.

The records, the newspaper said, include information about many of the reporters' confidential sources.

Do you think the defendant should have to go to prison to protect her confidential source?

It's not as if you'll be protecting the identity of a confidential source.

The present law applies primarily to information from confidential sources.

"How many confidential sources did you use for these stories?"

"And the public could not have been informed about the issues without the information we were able to obtain only from confidential sources."

"He's supposed to be interviewing a confidential source, but his phone's turned off."