What do I need to do if the DMV inquire me about a search that i did not perform?
If something like that happens, you first need to check whether other users of your account did the search. If that is not the case, you need to contact the DMV immediately to inform about this.
If I searched a motorist records, will the DMV tells the owner of the records?
Yes. This is because, the records of searches are public records and the DMW will inform the motorist if the motorist ask the DMV.