I missed the fact that she had no license so the detention would be legal as would the resulting search(s).
I was totes willing to ignore that for the sake of your hypotheticals.
Oh, and I wouldn't be surprised if
some such drivers could delay a full car search
until either a warrant was obtained,
or the car contents were "inventoried" after towing.
IIRC, the inventory trick is a poor second best to taking the time for a warrant,
but I think police who are impatient still get it to work some of the time.
It just complicates the prosecution's case.
As far as the registered owner being a wanted felon - that would explain a stop but if the driver was otherwise legal then the seisure should stop there and any further interaction should be consensual. That ended up not being the case here but I was clear that was the situation I was responding to.
Well, if it's a crime to harbor someone that one
knows to be a fugitive,
I'ma guess one has to act
very shocked, shocked that there's warrants out on them
to avoid getting jacked up for Accessory.
And if one
does put on a good act,
it appears that in TN one still has to
appear to be forthcoming
about the whereabouts of the I-can't-believe-he's-a-fugitive
in order to continue to avoid arrest.
Is it
really up to a traffic cop to conduct
that interrogation
in a parking lot during a traffic stop?
Or is the shocked associate going for a ride to a nice spartan
interview room down at the precinct house?
Maybe it's not a foregone conclusion,
but pretext for questioning by detectives indoors seems easy for me to imagine.
As far as your comment "did she steal it from the fugitive" - facts not in evidence. Did the officer have any reasonable suspicion that this was true?
"This isn't your car. Q: Are you driving it with the owner's permission?"
"No" => Uh oh.
"Yes" => "He has six warrants, where is he?"
"I take the fif" => Also not good?
On this last one, I'm not trying to be deliberately obtuse here,
but I'm not having any flash of insight as to how
refusing to answer that question ever entitles one
to drive off from the traffic stop in a car that one doesn't own.
Tentative conclusion: it
doesn't ever work like that.
(In the "Yes" case, it at least allows for the chance of
driving off if the story is good, right?
I just don't think there's a good story when the owner is a fugitive).
If lack of knowlege as to a non-owner current permission to use a vehicle was PC to stop and detain then you can stop any car at random because you don't know if the driver is the owner or if they have explicit permission.
Requires
Reasonable Articulable Suspicion that a crime has been committed,
or is about to be committed.
It must be based on specific and articulable facts,
taken together with rational inferences from those facts.
The suspicion must be associated with the specific individual,
and must be more than an inchoate and unparticularized suspicion or hunch.
Et cetera (see the Wikipedia article).
Thank you for your consideration.