Fulton County Associate Medical Examiner, Dr. Kelly Rose tells TMZ preliminary autopsy results lead her to believe Ashley "A.J." Jewell suffered from Sickle Cell -- a disease which inhibits oxygen flow to tissues in the body. Rose says it's most likely that Jewell was worked up from the fight -- and because of his condition, it's probable that he couldn't replenish the oxygen he lost during the incident ... which the Dr. says could have fatal consequences.
