Your question requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. His drug possession charge, as well as his illegal re-entry after being deported, may make him inadmissible to receive any immigration benefits. I strongly suggest that he contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding his situation. He/she would then be in a better position to analyze his case and advise him of his options.
Answered on Apr 30th, 2013 at 2:59 AM