What is the test for reasonable suspicion of illegal alien smuggling?

3 Even in the illegal alien context, the standard is unclear. In the consolidated cases of United States v. Munoz and United States v. Ortiz, 604 F.2d 1160 (9th Cir.1979), the court held that the totality of the circumstances did not support reasonable suspicion where two vehicles were traveling in tandem on a hot summer day, one contained a child in the front seat between two adults and bucket seats, the drivers had a Mexican appearance, and vehicle occupants did not look at the agents.