The Virginia in the Civil War Message Board

Did General R.E. Lee have a murdered brother?

Can anyone assist in confirming a myth that General Robert E. Lee had a brother, a Dr. Lee, who was murdered by bushwackers, in one of the border states, during the war, please? This myth has been spread by someone who has written an article on this subject, without any proper verification, and shown online. Unfortunately, the group that placed the article online seem to place some reliance on this article and its author, though I myself have my doubts that there is any truth in the statements in the article, about the death of General Lee's brother.
Any help in this matter would be very much appreciated. Thank you.