I reported my trucking company to DOT for making drivers work illegally,and was fired. Do i have a case?

On 9/10/12 I was forced once again to drive illegal by my company,i worked 16 hours( i stated at 8 am and finished at midnite)which is 2 hours over my hours of service,set forth by the Dept, of Transportation.Then they wanted me back at work at 8 am on 9/11/12(by law i'm requiredto take a 10 hour break before i return to work) i told my dispather i was going to notify DOT.They called me into the office on 9/11/12 and fired me.