why are people so cruel ?

my heart hurts for my youngest brother.  i feel helpless in this situation because there is so little i can do to help...i feel awful that life continues on and he is having to deal with a hell of a lot of shit from an ex girlfriend.  i wish i could do more.  i am worried and scared for him.  i am trying to have faith in the justice system but i am not confident in it..i want to believe that the truth will prevail and he will be found innocent of the charges...but he is a tall, muscular black man and i feel like the odds are already stacked against him :(  i hate feeling like this.  but i know my brother.  i believe my brother.  i will be there for him no matter what.  that is what i keep reminding myself.