although your stop may not have been legit, that does not mean the subsequent actions by the officers were neccessarily wrong. If you were actually DUI, it would lend credence to the officers actions. The fact the stop was not legit does not mean the actions that followed were misconduct in and of themselves.
This may be the underlying reason behind the attorneys hesitation. It would minimize your possibility of an award of damages and may reduce any damages due to your condition.
I would think, if anything, that a violation of your rights would be your best case since the stop was unjust itself. That violation would be your injury rather than the stun guns etc.

