So did he get in trouble after getting reported or what? Possession of CP is illegal even if you didn't find it yourself. And with all the proof. whoowee
I don't think possession means what you think it does
if he saved it, that's illegal
maaaaybe if it was still in his browser's cache, that's illegal
looking at it alone, is sorta not illegal, even for an adult, if it was then everyone who clicked the links is also going to jail
you could easily get out of that
but as a child?? you'd probably get a fine at most, depending on where you live, even for real possession of it