Merg,
Her is correct about this.
The situation is as follows. The police believe they have a right to stop the vehicle in this case. That thought is valid. The cop pulls over the vehicle and asks for proof that the person driving the vehicle is legal to do so. Proof is provided. The stop is OVER once that proof is provided. Unless the people in the vehicle are demonstrating more criminal activity at that very moment then the police have no valid reason to continue to detain the occupants of the vehicle.
The cops may ask the person legally who they are, per a Terry stop, but the person has no legal need to identify them self to the officer either. Cop can ask, are you so and so? (in this case so and so being a criminal with warrants). All that is required by the person is to state Yes or No to the question. Stating No removes all probable cause at that point. The police have no further legal means by which to detain the person in most states. There are a few states that have laws that allow cops to legally compel people to provide further identification beyond their word. The story from the OP was not from such a state.
The Supreme Court case was solely to determine whether the passenger can argue the validity of the stop. In the original case, the Appeals Court ruled that the passenger does have standing to argue the validity. Since the lower court had ruled that there was no reasonable suspicion to hold the vehicle after the tags were determined to be valid, the Appeals' Court decision meant that the passenger could challenge his detention. With no reasonable suspicion to continue to hold the vehicle, his detention was improper and any evidence obtained was not admissable.
In that case from what I can find, the court stated that the officer did not have a reason to stop the vehicle in the first place as the tags were not actually expired. Thus, there was no reason that the passenger should have been detained to begin with (as part of a traffic stop).
In this case, the officer did have a valid reason to stop the vehicle. The driver's license was listed as being expired. As the officer confirmed whether she was licensed or not (as she apparently now had an out of state license), the officer also confirmed that the subject the passenger was looking like was still wanted. At that point, the officer can turn the stop into a detention of the passenger for investigatory purposes.
When told to exit the vehicle, the passenger refused. The Supreme Court stated that if you are told to exit the vehicle that you have to. By refusing, he is now committing obstruction. At that point it does not matter if he is providing ID or not, he can be placed under arrest.
With regard to ID'ing himself, you are correct in that you don't need to provide a physical ID, but the officer can continue to detain you until he can prove that you are who you say you are or also that you are not the person that is the target of the detention. This can be as simple as the subject providing a name and date of birth and the officer confirms that information is valid or even that they can pull up a DMV photo and see that it is the same subject.
And if asked if you are a wanted person and responding "No" does not remove probable cause. All an officer needs to detain you is Reasonable Suspicion. In this case, is it reasonable to believe that the person in passenger seat was the wanted subject? If so, the officer can detain the passenger while they investigate that. Just responding that I am not that person does not mean that reasonable suspicion is gone.
- Merg