@kindnessmattersmost,
One: It's not illegal to fraternize with police.
Two: You need to space your sentences and paragraphs so it's easier to read. I don't understand why people write these massive blocks of text and don't realize how much easier to read if spaced properly. That more people would read it if it wasn't a challenge.
Quote:after doing so I learned that he cannot legally respond to that note.
Three: Not sure what country you live in but in the US it isn't illegal. It may be highly unethical for him to go out with you.
Quote: I realize that he cannot legally give his personal contact information or such through his work email.
No. Not a matter of illegality. It just might be his lazy and simple way to show you he's not interested in you without directly saying so and hurting your feelings.
Sorry but I don't think he's that into you. That his initial flirty/friendly behavior just might be the way he treats all women.
Any further attempt to contact him for personal reasons might appear to be stalkerish.