Where in the majority opinion (which is the only part of the opinion that is case law) do you find support for the assertion that it is not a casual stop if the officer already had reasonable suspicion? The majority opinion says nothing of the sort. The holding of the the majority opinion on Overstreet is this:
The relevant facts are undisputed. The record shows that Paris did not stop Overstreet's vehicle. Overstreet had already stopped his vehicle at a gas station. Neither did Paris stop Overstreet himself. When Paris approached him, Overstreet was using an air hose to pump air into one of his automobile tires. Overstreet was not detained. Paris did not restrict his movement in any way. Paris merely asked Overstreet about his actions at the mailbox and asked him for identification. Overstreet then volunteered that his operator's license was suspended.
We decline to hold that this brief encounter and inquiry constitutes a Terry stop which required a reasonable suspicion of criminal activity. Not every encounter between a police officer and a citizen amounts to a seizure requiring objective justification. To characterize every street encounter between a citizen and the police as a seizure, while not enhancing any interest guaranteed by the Fourth Amendment, would impose wholly unrealistic restrictions upon a wide variety of legitimate law enforcement practices. See United States v. Mendenhall, 446 U.S. 544, 554, 100 S.Ct. 1870, 64 L.Ed.2d 497 (1980). Indeed, it is not the purpose of the Fourth Amendment to eliminate all contact between police and the citizenry. Id. at 553, 100 S.Ct. 1870.
As long as the person to whom questions are put remains free to disregard the questions and walk away, there has been no intrusion upon that person's liberty or privacy to require some particularized and objective justification. Id. at 554, 100 S.Ct. 1870. Examples of circumstances under which a reasonable person would have believed he was not free to leave include the threatening presence of several officers, the display of a weapon by an officer, some physical touching of the person of the citizen, or the use of language or tone of voice indicating that compliance with the officer's request might be compelled. Id. "In the absence of some such evidence, otherwise inoffensive contact between a member of the public and the police cannot, as a matter of law, amount to a seizure of that person." Id. at 555, 100 S.Ct. 1870. In this case, there was no such evidence presented. The trial court properly denied Overstreet's motion to suppress.
Nothing in that supports the conclusion you drew.