revealed that the packages contained 10.5 kilograms of the mixture, of which 4,313 grams were pure methamphetamine. 3 . Indeed, mathematically precise estimates are difficult for motorists and officers alike, as indicated by Chavez-Valenzuela's assertion that David followed him for five to seven minutes but only traveled “a mile and some.” 4 . Questions asked initially during a traffic stop must be reasonably related to the justification for the stop. Perez, 37 F.3d at 513. David's inquiries about Chavez-Valenzuela’s starting point, destination and general travel plans were probably justifiable. See United States v. Pruitt, 174 F.3d 1215, 1220 (11th Cir.1999) (implying questions about a suspect's travel plans are permissible); United States v. Hill, 195 F.3d 258, 268 (6th Cir.1999) (<HOLDING>). However, the question about
holding that the return of a defendants drivers license after a traffic stop can convert what was a brief seizure into a consensual encounter even where the officer questions the defendant about criminal activity immediately thereafter holding that an officers mistaken belief that the defendant was speeding was not an objectively reasonable purpose for a traffic stop holding questions about a drivers purpose for traveling were reasonably related to a traffic stop for speeding holding that reasonable suspicion is required to prolong a traffic stop after the purpose for which the investigatory stop was instituted has been accomplished holding that any questions an officer asks of a stopped motorist must be reasonably related to the circumstances which justified his initial stop