ChumpChange,
Your brother can go to the Rancho Courts and ask for a Civil Harrassment Order, much like a TRO, but its civil. See if your brother can obtain a fee waiver from the courts and if so he can have the Sheriff's Court Services serve the neighbor. If, he cant qualify for a waiver than anyone not a part of the action over the age of 18 can serve him. Make sure your brother gets the Proof of Service form from the courts so if a 3rd party person serves him that has to be filed with the courts 5 days before the hearing date. If you have any more questions just send me a PM. Hope it helps.
Shannon