Summary: Tempted to conduct informal discovery outside of the usual depositions and interrogatories? Such informal discovery can be inexpensive and fruitful, but listen as Larry Fox, Crawford Lecturer of Law and Ethics at Yale Law School and partner at the Philadelphia firm of Drinker Biddle amp; Reath, reviews the significant restrictions that Rule 4.2 of the Rules of Professional Responsibility places on the conscientious investigating lawyer, including situations involving former employees, corporate entity control groups, and privileged information.