I am not a US citizen, I hold a green card and everytime I go through immigration returning from oversees I get the third degree bad... Last time I had all possessions including passport, wallet, luggage etc confiscated and I was placed in an interrogation room.. Dude came in and asked 101 questions some being wacked like have i had restraining orders etc put on me and other wierd shit... Anyway I explained I had been arrested in MA for Driving with a suspended licence and he told me there is basicly my name is flagged as its in the same class as Fellony/misdemeaner, not traffic violation - He was a little shocked as in PA (where I was) he didnt believe it was so I think it really depends on the state too... He was a lil suspect cause it was my second time in Mexico that month too