In what circumstances will a police officer issue a written warning to a driver for failing to return documents and return documents to the driver when the driver's dog sniffed drugs?

In Rodriguez v. United States (2015) 575 U.S. ___ [135 S.Ct. 1609], the officer issued a written warning to the driver and returned documents. (Id. at p. ___ [135 S.Ct. at p. 1613.) The officer then asked the driver for permission to walk his dog around the vehicle; the driver said no. (Ibid.) The officer then directed the driver "to turn off the ignition, exit the vehicle, and stand in front of the patrol car to wait for [a] second officer." (Ibid.) When the second officer arrived, the first officer conducted a dog sniff by leading the dog around the vehicle. (Ibid.) "[S]even or eight minutes had elapsed from the time [the detaining officer] issued the written warning until the dog indicated the presence of drugs. A search of the vehicle revealed a large bag of methamphetamine." (Ibid.) Unlike the driver in Rodriguez, D.G. immediately consented.