So long as your friend was solely cited as having an open container of alcohol and not having a "fake ID" he or she should not worry about a subsequent citation for the "fake ID" at this time.Most likely the citation will not have any negative effect with respect to obtaining the desired green card.However, I suggest that your friend consult with a criminal defense attorney to see if somehow court probation for the open container charge is in order where if the court probation is satisfied then the charge would be dismissed and the green card concern would be remedied over the situation you have written about.