Can I Get My 3 Year Old Being Assaulted At Nursery?

[ifIwasinvisiblewaitIalreadyam]

Hi all...
My 3 year old went to a nursery last year for only 3 months and had a lot of behaviour changes in those 3 months. During that time the nursery had an ofsted inspection and a new manager....even though it had only just opened, a brand new nursery.
Well because of my concerns of the changes in my son I went to see the new manager and before I could even say my concerns she informed me that my son had been assaulted by a staff member a few weeks before!! And no one had told me that during the assault my son had hit his head.
I immediately removed him from the nursery and we've been dealing with his behaviour changes since then, most of which have gotten better but a few that remain and the school nursery he know goes to are referring to see if he has ADHD. I saw a child development doctor last week with him and she said that this doesn't fit my son at all and she thinks the previous nursery is still affecting him and as I can't say that the one assault was the only one (and I'm convinced that there was a lot more to it) she thinks that he's still suffering from it.
My question is, is there anything I can do to see if he can remember any more of what happened there?? I know it's a long shot but I would like to know what happened. I feel this immense guilt for sending him there to endure this. :( x

??

Go to the police file charges and get them to investigate?

I’m a child psychotherapist. This is serious. I suggest contacting Social Services as the perpetrator needs to be immediately removed from contact children, pending an investigation. The nursery have failed in their legal obligation on safeguarding. Ask your GP what is the best route to get child and psychotherapy given the nature of this incident.

Better to consult this first to the experts that are good at investigating behaviors and etc. and if there's proof presented then it's time to file a report to the cops.