"Sovereign rights" does not excuse faulty driving practices. If you are breaking the law, just because you are law enforcement, you are at fault and can be sued individually. Then if you have a really good lawyer and he checks the training that the officer received, from his department, and it was recorded that they were told and shown not to tail gate, then you have an even better case, IE., mo' money, honey. If they never received the training, and it was available, much mo' money, sweetheart.