American historian and journalist most well known for his work to expose the circumstances surrounding the FBI's investigations of John Lennon.
He obtained his Bachelor's degree from Princeton University and his PhD from Harvard.
He was involved in a twenty five year long legal battle with the American government to get the FBI to release the files that were kept on John Lennon.
He married the American artist Judy Fiskin.
He was a close personal friend of Gore Vidal and published a book of interviews conducted with him.