There was a lot made of the DUI arrest of Alexandra Kerry's, Senator John Kerry's daughter, last month, but you will be hard pressed to find much information about the fact that the charges were dropped because of insufficient evidence. It is sad that it is likely they she will remembered as the Senator's daughter that was driving drunk despite the fact that she blew under the legal limit.
It is always important to contact a DWI attorney as soon as possible to discuss all your options.