Demand equal treatment in justice system

My son is mixed he has white and African American in him when he was 16 and 17 he was messing around with this girl whom lied to him about her age he never got in trouble he had no record when he turned 18 they arrested him he got 14 years no good time nothing 3 other boys same age same girl same but they were white they got probation my son is a good kid I filed for a appeal but I'm having problems getting money together for a lawyer please help free my son yuval