You can't file a police complaint on a review made and / or reply made by that disgruntled business owner.Firstly, do a Police case against him and teach him a lesson that customers and reviews shouldn't be taken lightly.
Secondly, what do you mean by personally identifiable info online? What exact info is leaked?
Difficult to see it work in this case, there's probably a much better chance of Google support coming to the rescueYou can try filling a DMCA takedown request : https://support.google.com/legal/answer/3110420?visit_id=637715066007409279-2587285243&rd=1
Mainly it is for copyrighted content, but corporations and people in the know use it for lots of other stuff as well. It is worth a try.