So the question comes down to screw your brother or screw your father.
Personally i would let the brother hang out to dry. No reason your father or anyone else should pay for his mistakes. And if he is not stopped the mistakes will get bigger and hurt more people, including yourself.
Personally i would let the brother hang out to dry. No reason your father or anyone else should pay for his mistakes. And if he is not stopped the mistakes will get bigger and hurt more people, including yourself.