Apparently, it's easy to get out of tickets if you're in the medical field or in law enforcement. My cousin, who's in Homeland Security, has been pulled over a few times but he's never gotten a ticket. One time, he was even going over 30mph. The cop said he would have arrested him if he were a civilian but he just warned him to drive more safely.
Doctors also seem to get away with speeding when the cops see their medical licenses. My neighbor says he just acts like he's in a hurry to save someone and tells the cop to just write the ticket quick. Everytime, the cop just lets him go without a ticket. Also, he says that some cops are reluctant to offend physicians in case they ever end up in their hospitals.