Bobby Maurice Tillman, the Georgia boyhood stomped to afterlife alfresco a home area a affair was actuality held, died from a aching heart, Douglas County Coroner Randy Daniel told CNN Tuesday.He said the 18-year-old acceptable suffered a breach in a rib bone, which in about-face punctured his heart. If the adolescent man had not been stomped, he apparently would not accept been afflicted in that way and would accept survived the beating, Daniel added.Police say Horace Damon Coleman, 19, Emanuel Benjamin Boykins, 18, Quantez Devonta Mallory, 18, and Tracen Franklin, 19, stomped and exhausted Tillman alfresco a affair in busline Atlanta over the weekend. The four men are adverse abomination annihilation charges.Douglas County Sheriff Phil Miller has said the advance happened afterwards some girls got into a fight, and one of them hit a boy. That boy, according to Miller, said he wasn't activity to "hit a girl," but the abutting guy who came by was activity to get exhausted down.He was baby in stature, but ... his spirit and his backbone were bigger to me than this world.No drugs or booze were begin at the scene, according to the sheriff, who said he doesn't apprehend any added accuse in the case.