I've been in your shoes. I see both sides of what people are saying.
Were you in the wrong? In the eyes of the written law...without a doubt.
Was the cop out of his jurisdiction? If he tagged you within his city limits, he can still pull you over down the road in another city. As for being POST certified and having jurisdiction anywhere in the US, that is usually under only extreme or extenuating circumstances. Even when a cop is off duty, he still has the obligation to uphold the law, but he's not going to pull someone over for speeding if he's on a day off.
Were you fortunate he only cited for 9 over? Very much so, but not as much if he'd just given you a warning.
As for using any contacts to help you out? You'd be stupid not too. Let's see, you can call on a favor that was thrown in your lap, or you can reject it and instead takes points on your license and likely higher insurance rates. The choice seems relatively clear. I know what I'd do. (C'mon, it's not like you are calling on a lawyer to get you off of some murder charges...)
