I know this isn't tech, but this is literally the ONLY forum I use where people don't know me! So I'm kind of stuck.
I need to call a Sheriff's deputy about a personal matter, nothing negative, just seeking information. Socially speaking, he would be considered of a slightly lower rank than I am, so I'm not calling from a subservient position. But I'm not his supervisor or anything like that, either. Think more like... an elected official.
He has emailed me and referred to me as "Mr. CSDude", and signed the email as "Lieutenant John Doe". The email is super professional, no pleasantries or anything.
When I call him, should I refer to him as Lieutenant, John, or other? I don't want to come across as intimidating, but I don't want to come across as intimidated, either.