Seeking Assistance to Identify Deceased Black Male

The Fulton County Medical Examiner is seeking assistance in identifying the deceased man shown below. He is a black male about 6 feet tall and weighs 191 pounds. We have reason to believe that his name may be Robert Morrison, or that he used that name. He was found dead on March 11, 2011 near 1000 Johnson Ferry Road in Sandy Springs. If you have information which might help confirm the identity of this man, please call the Fulton County Medical Examiners Center at 404-613-4400, ask for the Investigations Section, and reference case number 11-0504. The image below is a sketch prepared by forensic artist Marla Lawson of the GBI.
http://www.fultoncountyga.gov/press-release