I for one think it's disgusting for anyone to behave this way, let alone an 8 year old boy. Something is NOT right, and whether it's the home life, parenting, what he's seen on tv or (real life for that matter) and/or what he's being taught in school, sadly, everything could come into play in today's world.
But I haven't seen anyone look at the other side of the coin here, and ask if what the girl and her family have said could be "false" in any way or made up? Who is to say this little girl isn't abused and/or is looking for attention or something?
In today's world anything is possible. I pray not, but wow... They say there are 3 sides to a story, hers, his and the truth, and I can only imagine the truth behind this story.
I expect that has been looked at. Typically, there is enough information gleaned from this type of investigation to determine whether or not to substantiate the allegations, and if they hadn't been substantiated, it is highly unlikely that we would be reading about it in a public forum. In my experience, it isn't usually that difficult to figure out who's telling the truth between a couple of 8 year olds. Often, the offender will admit to it.