Are you thinking CPS, because you think his behaviour could be the result of being abused? Or is it because he is abusing other children? Whichever it is, the situation is very complex and I'm not sure what if anything you could do, to involve CPS. Unless your child is directly affected, it is up to whoever is affected to make the report, either to the police or to CPS. You've already got enoguh training to realise that your hands are very much tied, in so many ways.
Depending on what is really going on in this kid's head, he may not have been abused at all. There are so many possibilities. A factor has to be his own pubescent hormones zinging around plus (from your description) lack of parents being proactive and acknowledging anything needing to be done.
Don't anyone start yelling at me, but I am going to talk about the possibility of this being Asperger's. I have reasons for this, so bear with me.
Let's say that this boy DOES have Asperger's. Another problem he appears to have, from your description, is parental uninvolvement. I've seen it before - parents can go in two possible directions, when they're told they have a child with Asperger's (or other problems). They can either inform themselves and do what they can to help their child overcome what problems they can, or they can just carry on living day to day and deal with each crisis as it occurs.
The thing with Asperger's - these kids CAN learn social skills, they CAN learn appropriate behaviour, but it takes active, proactive, malleable and compassionate parenting. You can't just leave the kids unsupported, untrained and uneducated.
Helen Keller is a good example - your description of these parents sounds to me like Helen Keller's parents, before Annie Sullivan. Now, Helen Keller's parents were not bad people, but they were overwhelmed and didn't know what to do. At least they did apply to have someone come and help them.
But parents whose coping strategy is denial and isolating themselves from support and information, are not in a good position to help their child learn appropriate behaviour.
Now, if you take a child like this, who has no models for normal behaviour (and they need models, they do not learn merely from being yelled at) COULD go the way you describe.
What you describe as your response (talking to him and telling him hisbehaviour was unacceptable) - that is what I would do as a parent. But your response would have been virtually worthless without follow-through from anywhere else.
Now, I did say that Asperger's alone plus teen hormones plus parental uninvolvement COULD explain this behaviour. But the others are right - chances are, there is a lot more to it. For this to be simply Asperger's, the accompanying parental uninvolvement would have to be extreme, I feel.
But there are other conditions which can often get misdiagnosed as Asperger's. Asperger's itself is often misdiagnosed to begin with. Medicine is a very inexact science.
People do get very concerned when, because of this frequent confusion over what a diagnosis happens to be in a difficult child who is causing deep concern in a community, the label of Asperger's gets associated with dangerous attacks to other people either sexual or violent (or both). For example, the Port Arthur massacre where Martin Bryant went on a hunting spree through a tourist attraction on a public holiday purely because he wanted to hunt people and kill them - the media made a big thing about the claim that he had a diagnosis of Asperger's. The implication then was, ALL people with Asperger's must be equally dangerous. But Martin Bryant, whatever his true condition, is also a product of a weird and inconsistent upbringing coupled with some instances of sheer idiocy in parenting (such as his father buying him guns when his stability was very questionable). At the time, the various autism associations were very angry with the media spin. But the facts remain - someone had given him a diagnosis of Asperger's, so the stigma was inevitable.
The thing is, Aspies can get violent, but usually when provoked or extremely frustrated. Aspies can, with support, learn to fit in to society in some way. They are capable of learning the social skills which don't come natually. They are certainly capable of learning to NOT look up girls' dresses.
So could this just be Asperger's? Yes. If it is, does this explain all you describe? No.
But then we come to - why is any of this relevant? Knowing any of this makes absolutely no difference to what you can do. You can't get through to the parents - you tried back when you were friends and tey didn't listen then.
I'm thinking about your (limited) choices.
1) Try talking to the family. Nope, you tried that.
2) Talk to other people in the community. Nope, that would be slander and would be actionable.
3) Keep your own child(ren) safe and if anyone reports to you that they have had a problem, urge them to report it - yes, that is not only your right, but could be considered your responsibility.
What would (3) mean to the difficult child? It COULD mean that he gets into seriously hot water, legally, and ends up in the prison system without anyone ensuring he gets the medical help he undoubtedly needs. That would be a shame, but as things are going, that could be on the cards in his future anyway, if this keeps on.
Or it could mean that someone steps in and court-orders neuropsychologist assessment and intervention, despite parental efforts to sweep it all under the carpet. THAT surely would be a good thing? It at least give him the best chance of learning what is appropriate behaviour and what is not.
There are medical conditions which have hypersexuality as part of the syndrome. Certainly if I were the parent of such a difficult child and was made aware of this, I would be asking his doctors for help and maybe an explanation. You don't know that these parents haven't done tihs but maybe have a doctor who is assuring them that he is fine. Yes, it happens. If you read these pages you will encounter such horror stories.
The thing is, what you describe is a nasty social problem for the community and if it continues, the excrement is going to hit the air conditioning very soon whether you personally do/say anything or not.
So what do you do? Where it is appropriate for you to do so, report it. In other words, if it impacts you personally, if you witness something personally or it happens to you personally, report it. But don't stick your neck out too far or you could make things worse (unwittingly causing a 'boy cried wolf' scenario, if you report too readily). Otherwise, and I hae to say it, you have to sit and wait.
You can't warn other people (they will find out soon enough) because you leave yourself wide open to some very nasty accusations yourself. And that would muddy the waters badly, which would interfere with your desire to protect people.
I wish I could give you something more concrete, but this is a very difficult situation.
Some parents are overwhelmed; some parents seem to be doing nothing but are in fact doing everything they can. I've been accused of letting my kid get away with appalling behaviour when in fact his behaviour (while not meeting normal standards) is actually showing amazing improvement. And some parents have simply given up and are bracing themselves for criticism by choosing to insulate themselves and their child from any charges which may be laid.
Example - when difficult child 3 was 5 years old and just starting school, he would often shout at his teachers especially of those teachers were the sort who shouted at the students. For difficult child 3, he would treat other people in exactly the same way they treated him. So as you can imagine, the sort of adult who uses control, shouting and sarcasm to discipline students would find themselves receiving sarcasm and shouting back from him. Of course, those people then attacked me for my bad parenting and told me that my child needed firm discipline and a good spanking. Even good friends of mine believed I was a slack and complacent parent. A neighbour who I thought was supportive and who had a son with cerebral palsy was surprised when I said that difficult child 3 was expected to qualify for support funding. "There's nothing wrong with him," she said to me. "He's just a spoiled little boy."
I was so hurt - I had been there for her when her son was critically injured, despite her son's injuries and severe disabilities we could see how much better he was functioning mentally than difficult child 3, and yet - she was in denial over my son. It was easier to believe I was a bad parent, than to accept that there were big problems.
What I suggest you do - don't go stirring up trouble (or doing anything where you could be accused of stirring up trouble). But anyone who has already spoken to you and expressed their concerns - talk to them and discuss things with them. Talk to the police OFF the record and ask their advice on what you should do/can do. Maybe you and other parents "in the know" could organise some sort of roster to keep a protective eye on each other's children and to report to each other any problems you see. But I'm sorry, I don't think there's anything more you can do for now.
It really is a case of waiting for the other shoe to drop.
Marg