Family Based Greencard

MY MOM IS MARRIED TO AMERICAN CITIZEN. EVERYTHING LOOKS LIKE GOING OK, BEEN RENEWING EAD FOR PAST 2 YEARS, JUST SEND IN 3RD RENEWAL SO I CAN KEEP MY JOB, AS SO MY MOM AND MY BROTHER, JUST RECEIVED GC INTERVIEW DATE WITH A LOT OF PAPERWORK TO PROVIDE ADN BRING WITH US, ALL THREE ARE AT DIFFERENT HOURS THE SAME DAY, I AM WORRIED NOW, B.C MY BROTHER HAS A FELONY CHARGE SINCE 12/2004 AND CASE IS NOT PROOVED, HE IS NOT GUILTY NOR GUILTY, NOT SURE WHATS GOING ON, NO COURT DATES, NO LETTERS, ATTORNEY SAYS HAVE TO WAIT, I AM SCARED FOR MY BROTHER TO GO TO THAT INTERVIEW, NOT SURE WHAT TO DO, DONT WANT HM TO BE DEPORTED JUST LIKE THAT AFTER INTERVIEW, LAWYERS WANTS UP TO $20,000.00 TO SEE WHAT THEY CAN OFFER, PLEASE LET ME KNOW IF SOMEBODY HAS ANY INFO ABOUT IT, APPOINTMENT DATE IS 05/24/2005, SHOULD I HAVE HIS APPOINTMENT RESCHEDULE?????????????