"the looks of it the guy is a real scumbag if the government is right."
Child pornography cases always guarantee public sympathy for law enforcement.
Which is why it's always best for the government to use them if law is likely to be contentious.
Note BTW this is the case in a United States court, just in case anyone thought this was the position in every other country in the world.
Since we are talking the US Constitution 5th Amendment IE the right to not incriminate yourself, I'd guess the question is what would be the story if (in earlier days) he was a Mafia book keeper and kept the books in his own personal code ?