the same thing happened to me. i have two older brothers, the one is 8 years older than me and the other is 5 years older than me.
the oldest beat me until i was 16, if it weren't for the teachers and counselor at school he would have killed me.
anyway i filed charges against him, the police told me if i didn't file charges the next time he sees me i will be in a body bag.
when i filed charges my oldest bro never touched me again.
my older brother, the last time he beat me was 3 months before my wedding, and the reason that stopped was because my hubby told his father, and his father told my ma if your son ever beats your daughter again i will call the cops.
i think for your brother him being in jail might make him realize that it was wrong what he did to you.
if he ever lays a hand on you again, call the cops don't even think twice about it. (((hugs)))