Supreme Judicial Court Rules Rules of Professional Conduct Rule 3.4: Fairness to opposing party and counsel. Except as provided in paragraph (b), a lawyer shall not represent a client if the representation involves a concurrent conflict of interest.NO, you can't call opposing counsel to testify! For example, a lawyer who receives from opposing counsel an offer of settlement in a civil controversy or a proffered plea bargain in a criminal. The general answer is yes. Among the least appetizing court appearances that an attorney must make is a motion to withdraw his or her representation from a client's case. Further instructions on the law, and may allow opposing counsel further opportunity to question the juror. Opposing counsel filed a motion for sanctions in the United States District Court for the District of Massachusetts. In order to accomplish this, you have decided to file a civil suit in the United States District Court, without the help of an attorney. Court Cost Vendors who accept compensation from the Indigent Court Cost Act, G.L. c.