If he did in fact have child pornography, even one photo, Google would have to delete that file off their servers.
If it was CP and Google sent him the file, wouldn't Google be transmitting/distributing CP?

I have never seen the photo or Dennis Cooper blog. In fact, I didn't even know Dennis Cooper existed until that first article on WPTavern.

However, it can be said that if DC did in fact uploaded CP, wouldn't the FBI (if DC is in the US), RCMP (if DC is in Canada), and so forth, go to him and arrest him?

See? Both sides.