I don't care that my german shepherd bit my brother
Why did the dog bite your brother?
I think my brother was trying to date my dog and I suppose he deserved it
Whether or not he deserved it, you shouldn't allow your pets to be biting people for such reasons. Barring dire circumstances, if your dog was known to be a public danger, you may have to euthanize him.
I don't want to hear your opinion and I think this is an emergency so I'm going to call police.
If your brother is really hurt you should get him medical attention. You should just be aware they will seize the dog to make sure he doesn't have rabies or any other diseases.