Probably unlawful imprisonment. AZ law allows for citizens arrest if you observe a felony happening, or in rare misdemeanor situations such as riot. Unfortunately, illegal entry into the US is not in and of itself a felony, and neither is simple trespass.
Willful damage and vandalism to private property, killing livestock not a felony?
36 posted on 02/09/2009 6:59:16 AM PST by meandog
(The two named Bush get the bird from this hand!))