Urgent : Personal data exposed !

Recently a member logged in my forum and exposed my personal data such as my real name,surname,the name of my mother and father.One of my mods permanently deleted his post ( the only one ) and banned him.

I don't know now how to find him.I have no option to locate his ip address as there is not any post from him.( so no ip button )

Please if anyone know how can i located him please inform me.I want to find him and alert the police.

Not sure you can find him with no posts & them not on line. To be honest I don't think the police will be very interested.

For all kinds of reasons it is a good idea for the future, to set up a basket/bin & make sure all removed posts go in there.