An attorney had been practicing in criminal defense for eight years-ever since he graduated from law school and passed the bar-and had handled many difficult and complex trials. Two years ago, he has saved enough money to start investing and hired a stock broker. Three weeks ago, the attorney learned that his stock broker had been injured in an accident. After speaking with the broker, the attorney agreed to handle the broker’s personal injury case and a written fee agreement was signed. Now, the attorney is renewing his advertisement in the Yellow Pages. He changes his advertisement to read: “Criminal Law and Tort-Personal Injury, Experienced Trial Lawyer, Contingent Fee in Personal Injury Cases.” Has the attorney violated any Model Rule?