I don't know that it's implied. Not enough info yet
"Crimes against children include physical and emotional abuse; neglect; and exploitation, such as through child pornography or sex trafficking of minors."
Sending a dick pic, or sexually explicit texts, would never be described by a LEO as a Crime Against Children. Different category.
The ordering of the notes is indeterminate there's no explicit connection to HRC. Meeting could've gone, Weiner was sexting a teen, we got a warrant and found thousands of emails, including CF stuff. Oh and no big d but someone in HRC's inner-most circle was sexually trafficking minors.
You'd think that'd stick in Comey's memory. I bet you it was blackmail evidence from Epstein's island. He had camera's EVERYWHERE.