Racially-charged protests erupt outside Karmelo Anthony murder trial as court is shown photo of killer teen stabbing Austin Metcalf, 17, to death at track meet

The murder trial for Karmelo Anthony, the Texas teenager who fatally stabbed a fellow student at a track meet last year, began today. He stands accused of first-degree murder after killing 17-year-old Austin Metcalf with a folding knife after a heated argument at the high school event in Frisco. Prosecutors alleged Anthony, now 19, tossed the murder weapon before fleeing the scene and attempted to blend in with fellow students while making his escape. After his arrest, he claimed he acted in self-defense in the disagreement over seating at the Centennial High School meet. He has pleaded not guilty. Jurors...