JUST IN: 17-year-old student was st*bbed in the heart at a Texas high school track meet and died in his twin brother’s arms 17-year-old Karmelo Anthony, has been charged with first-degree m*rder The father said his son, Austin Metcalf, was k*lled after another student got upset when told he was in the wrong spot "I'm not trying to judge, but what kind of parents did this child have? What was he taught? He brought a knife to a track meet and he m*rdered my son by st*bbing him in the heart" Austin’s twin brother, Hunter, witnessed the st*bbing and tried to stop the bleeding No other injuries were reported