The release of the video evidence could determine if Karmelo Anthony's self-defense claims are substantiated. Authorities have reportedly collected video evidence of the confrontation between two Texas teens that resulted in a fatal stabbing during a high school track meet in Frisco, Texas, on April 2. Karmelo Anthony, 17, has been charged with first-degree murder in the death of Austin Metcalf, 17. Police said Anthony allegedly confessed to the killing on claims of self-defense. The release of the video evidence could be key material for the outcome of the case. Dominique Alexander of the Next Generation Action Network, a civil...