You should consult with an experienced immigration attorney as soon as possible to determine whether the conviction renders him deportable and assess options for relief. As a permanent resident, he is entitled to a hearing before an Immigration Judge. First of all, the government must prove whether your brother can deported. This depends on the exact conviction and whether the government has sufficient evidence. Even if that is the case, he might avoid deportation because he qualifies for relief from removal because a long-term residence and family ties in the U.S. The immigration police, ICE, might tell him that he cannot do anything and have him leave voluntarily just to make their life easier. He should not agree and first have an attorney help him assess his situation before he makes a decision.
Answered on Nov 29th, 2011 at 2:40 PM