ORIGINAL: NightFire
Do not go whoop his a$$ either, you are 19, a legal adult. An adult beating a minor down is not good, you would go to jail.
x2. Kudos to NF for the mature response.
I suggest a video camera. Tape him not once but a few times. I wouldn't take that over there and tell them about it, just keep that in mind so you're confident that he needs to knock it off. Its pretty easy for the cops to figure out whose telling the truth when there's video footage. Best luck and God bless.