I'm not going to report my abusive grandfather to the police for something he did 30 years ago. Do you need me to tell you again?
Really? Oh why don't you want to report him?
He will get away with it anyways, there's no point
If you think it was something serious you should go to the cops. Have some trust on the justice system.
My point is there is no point. It won't change the past.
Even if he did it long ago there needs to be some sort of punishment, abuse is not right. I say you try to go through with it, many killers are not found until 20 years or more later so why not abusive folks?