He’s lying. Does he save all his spam, or only the child porn spam? If he didn’t intentionally download it, he would have erased it immediately. When I visit adult web sites, I have accidently downloaded what appears to be child porn. I immediately delete it. Not just because it’s illegal, but because it is sicking and sad. This is what a normal person would do. Your husband, on the other hand, needs help. You must confront him about this.