A barrister in the United Kingdom and admitted to the bar in numerous jurisdictions in the United States of America. His primary work is international commercial law and practices international human rights law from London. Dr. Pepper convened a seminar on international human rights at Oxford University. He has represented governments in the Middle East, Africa, South America, and Asia. Dr. Pepper has lectured at many universities and has been interviewed on many major news programs.

Dr. Pepper was a friend of Martin Luther King in the last year of his life. He represented James Earl Ray, attempting to get him the trial that he never had. Dr. Pepper then represented the King family in a wrongful death civil trial King family vs. Loyd Jowers and other unknown co-conspirators. During a trial that lasted four weeks he produced over seventy witnesses. The jury took less than an hour to find in favor of the King family. He is the author of four books including "An Act of State: The Execution of Martin Luther King, Jr."