I'm on a F-1 visa and was arrested and charged with possession of a controlled substance and drug paraphernalia. I have completed a diversion program in which i did not have to make any guilty pleas whatsoever. From my research, this is not a conviction for immigration purposes. I have checked with my lawyer already. The case is going to be dismissed. I am currently outside of the US right now and would be returning. I would most likely be sent to secondary inspection at POE to provide more details about the case and if they ask me to explain everything about the case, can i remain silent? I want to be cooperative but not be making any admissions to the crime either.