In most states an officer cannot compel you to roll your window down further than is needed to speak or pass papers through.  He cannot order you out of the car for a traffic stop.  In a DUI stop (non-traffic related stop) you are not required to provide license and registration since there was no reasonably articulable reason to stop you.  You may have to orally provide name, address and date of birth.  That is considered identifying yourself in most states. 

 

In many states any time you are detained by police it is considered a "custodial arrest".  In a custodial arrest the officer may not conduct an investigation without fully informing you of your rights.  The moment the officer asks the first question, he is breaking the law unless he first informed you of your rights.  And if he does inform you, that's when you insist on having an attorney present. 

 

The cop will go ballistic and threaten you very loudly if you stand on your legal rights.  He wants you very badly to waive those rights.  Just be respectfully silent until they let you go. 

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