U.S. v. Guerrero (2007), a U.S. Circuit Court of Appeals case is covered on page

U.S. v. Guerrero (2007), a U.S. Circuit Court of Appeals case is covered on pages 377-378 of the textbook. Read the case. After the officers returned the license and registration, was Guerrro free to leave? Explain your answer.
Textbook: John N. Ferdico, Henry F. Fradella, and Christopher
D. Totten, Criminal Procedure for the Criminal Justice Professional, 12′ Edition, Boston, Cengage Learning, 2016.