In a article from CNet, we are told that US District Court judges in Missouri and New York threw out searches used against people arrested in the Government's largest Child Pornography operation, Candyman.

The problem is that it appears the FBI used a users list without verifying that all users actually subscribed to the mailing list that was distributing the illegal content.

Both justices indicated that the law enforcement agencies need to be much more careful, especially since (they assert) the FBI knew that most of the users didn't subscribe to the mailing lists and therefore there was no evidence that the users actually received the illegal material.

The article didn't state whether these particular defendants has illegal materials in their homes when they were searched or whether the only evidence against them was the evidence from the FBI.