>>>IMHO, this is a very sketchy claim at best
Sketchy? The Cherubs have a more human appearance than the yellow cartoon children in the Simpsons. If someone can be prosecuted for a nude fake picture of a yellow Bart Simpson, do you think that you cannot be prosecuted for Cherubs?
Yes, sketchy. The Cherubs may "have a more human appearance" than the Simpsons drawings, but they are not sexually explicit. I don't know what kinds of images this guy had, but I'm guessing they were not just artistic nude drawings of the Simpsons.
Why not both at the same time? Prosecutorial discretion, don't you know.