Can a police officer stop a citizen for questioning in a consensual exchange?

willing to answer some questions, by putting questions to him if the person is willing to listen . . ."); Morgan v. Woessner, 997 F.2d 1244, 1252 (9th Cir. 1993) ("[P]olice may stop a citizen for questioning at any time, so long as that citizen recognizes that he or she is free to leave."). Consensual exchanges are not considered "seizures" under the Fourth Amendment, but a consensual encounter becomes a "seizure" when a reasonable person in the shoes of the individual approached would believe that he or she is not free to leave. Id.