it sounds really familiar, like I've heard this exact story before
A while ago there was someone on the tri boards who was pregnant and asked about the family reactions to her news that she was pregnant because of her husband's conviction. It came out that he had been convicted of possessing child porn on his computer, and she claimed that you can't tell that a 15 yo is under-age, especially if you've been told they were 18.
Something like that.
It lead to an interesting discussion how those photos are usually named and tagged by the authorities to track where the offenders go, get their material, etc.