"...after which the officer got out of the car and started asking me not to take pictures! lol"

It is, generally - and certainly here, perfectly lawful to take photos of police doing their job. You were entitled to ignore him or tell him "Sorry it's lawful I'm keeping photographing". No offence was committed. Harassment of photographers is becoming a bit of an issue.

http://p10.hostingprod.com/@spyblog.org.uk/blog/harassment-of-photographers/

The delicious irony of a Googlecar being pulled is too funny.