If he introduced himself as Officer Dan Page, or anything that identified him as a member of the city's police force, then he doesn't.
If he introduced himself as Officer Dan Page, or anything that identified him as a member of the city’s police force, then he doesn’t.
"Article 88 of the UCMJ (Uniform Code of Military Justice) makes it a crime for a commissioned officer to use "contemptuous words" against the President, Vice-President, Secretary of Defense, and other specified high government officials. Enlisted members can be prosecuted under Article 134 for using similar words. The words have to be "to the prejudice of good order and discipline in the armed forces, or conduct of a nature to bring discredit upon the armed forces." Military members have gotten into trouble for calling officials "fascists," "thieves," murderers" "tyrants" "fools" and "gangsters."
http://nlgmltf.org/leaflets/GI_Rights_free_speech.html
From the above I'd need to see the content before making judgment.