whoa, whoa, whoa
Legally, I think you are under arrest when an officer of the law says to you, "You're under arrest for



". The officer should surely know that, and I'd be interested in seeing a credible source that says he thought an arrest takes place at a pull over. Legally, I think you're "detained" when pulled over.
Once arrested, you have the right to an attorney when talking with law officers, and you can consult with your attorney. You don't have a right to have an attorney present at any and/or all times.
I honestly would only evoke the "am I under arrest (if not then I'm leaving)" in some REALLY specific circumstances.
I also think it's a disservice to tell someone to refuse to talk to an officer about anything. You may have the legal right to do that, but it will generally be seen as confrontational. it's not going to get you off any easier. And sorry, it makes you look stupid. I'm a master talking a lot and saying nothing. Non committed answers are easy to do. You acknowledge that the officer is talking to you but you're not volunteering any info that you don't want them to have.
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