How can the public confirm that NCMEC doesn't already contain non-CSAM images of US officials engaging in illegal, compromising or embarrassing situations? Are

How can the public confirm that NCMEC doesn't already contain non-CSAM images of US officials engaging in illegal, compromising or embarrassing situations? Are there nonpublic images from Jeffrey Epstein's blackmail collections already in the database? Is there any system that could be developed to trustworthily prevent this situation without distributing child porn?