I do not know why you are not responding, but you are not charged per question, per response, nor per answer. So after I give you my answer, you can continue to ask me questions without additional charge until you are satisfied. I apologize if it is a site issue that you posted and the post did not go through.
Unfortunately, unless the law changes, he will never be able to come back to get U.S. Lawful Permanent Residency (but he may be able to visit). There are 4 things in U.S. immigration law that have no pardon, that not even a U.S. Presidential pardon works, and those are fraud marriage, false claim to U.S. Citizenship, money laundering and trafficking of a controlled substance. They do not even need a conviction, all they need is "reason to believe" that he was involved in or benefited from any type of drug trafficking.
Here is a link:
IF he were to somehow get a pardon or a vacature of the conviction (sealing or expunging does not work), and IF he was to convince an immigration judge or consular officer that he was not involved in drug trafficking and IF he had a U.S. Citizen or Resident spouse or parent petitioning for him, then MAYBE he could get a Residency again. It would be a long and expensive road and he would need a VERY good attorney to help him. You can try to find one at http://www.ailalawyer.com/. I am truly sorry. I wish I had better news for you.
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