Meanings of anonymous informant in английском

Is there an ' anonymous informant fairy' looking down on this case?

You testified earlier that you received information from an anonymous informant initially linking Oscar Garcia to the murder.

In 2005, antitrust authorities raided several car glass producers across Europe following a tip-off from "an anonymous informant", the Commission said.

"It was a phone call from an anonymous informant."

More than 150 witnesses -police officers, legal and political experts, alleged victims of assaults, anonymous informants -have given testimony over the years.