The fact that they found child porn on his computer is the scariest part. Almost any technical person could frame almost anyone else with CP possession. It's just a matter of putting some files on a computer and/or faking some logs, browser history, etc.
It would be incredibly trivial for the CIA to put CP on his computer and then use that as a method of getting him into custody. A rogue agent could do it without anyone else knowing.
The frightening aspect of CP possession is that there's basically no one willing to even hear out a person charged with the crime. It's the perfect thing to frame someone with precisely because it's so revolting and hard to disprove.
CP possession laws should be changed to put much more onus on the state. It possibly should not even be a felony to merely posses simply because of how hard it is to prove beyond a reasonable doubt. Production of CP is clearly the main problem and far easier to be confident in prosecuting.