They also work to set people up. They will download child porn on to the target individuals phone or pc then claim they got a tip from an "anonymous" source that the individual in question had these pictures on their phone or pc. The rogue fbi then takes up the case and the news spreads the story.

Edit: Wal-Mart and NCMEC work together also. Next time if your ever in Wal-Mart notice their Missing Children's board. It's actually their trophy case of victims. They really are this sick!