See United States v. Watson, 423 U.S. 411, 424-25, 96 S.Ct. 820, 828-29, 46 L.Ed.2d 598 (1976) (noting that the absence of any indication that the defendant was a newcomer to the law is an important factor in determining whether consent was voluntary).In determining whether consent to search was given voluntarily, we are also instru