This is a petition to establish the truth of exceptions. It is assumed in favor of the defendant that *517on the facts reported by the commissioner the exceptions ought to be established. The case is treated on that footing.
The defendant was charged with assault and battery. The person alleged to have been assaulted was a constable qualified to serve civil process and he was at the time serving a writ of replevin wherein the Kane Furniture Company was plaintiff. An attorney at law, Mr. Grady, was present at the trial, and was a part of the time within the enclosure occupied by the assistant district attorney who tried the case, and talked with him and showed him notes of testimony and held whispered consultations with witnesses called by the Commonwealth. He gave to the assistant district attorney the kind of assistance that a police officer familiar with the facts commonly affords. When the case opened, the assistant district attorney, who tried the case without previous preparation, and the trial counsel for the defendant believed Mr. Grady to be such an officer. Later counsel for the defendant, on learning the facts, stated to the trial judge that Mr. Grady was attorney for the Kane Furniture Company and objected to bis actions and asked that he be removed from the enclosure occupied by the assistant district attorney.
There was no reversible error in the overruling of this objection and the denial of this request. It is plain that the entire control and conduct of the case was exclusively in the hands of the assistant district attorney. He simply availed himself of an obvious source of information needed for the presentation of the case to the court and jury. The case at bar does not go so far as Commonwealth v. Williams, 2 Cush. 582, 585, and Commonwealth v. Scott, 123 Mass. 222, 233, and cases more or less similar where assistance has been rendered to the prosecuting officer by other members of the bar, with approval of the court. The facts show no violation of G. L. c. 12, §§ 20, 29, 30. There was no error in the exclusion of questions put to Mr. Grady by the defendant.
Exceptions overruled.