So, here’s the problem that I see - you don’t really have a great excuse for speeding. You had no idea if the officer was on their way to an emergency or semi-emergency call. Speeding because you were blindly following a cop is not a very smart excuse. (And for all you know, the officer was on his way to an emergency, and forgot to turn his lights on.) Just because someone else is doing something stupid/illegal doesn’t make it okay for you to join in.

I mean, I agree that it was a bit rude for the officer to give you a ticket, since no one should be above the law - and I agree that the officer most likely WAS also speeding.