An eyewitness to the fatal stabbing that left 17-year-old Austin Metchalf dead claims that his alleged killer, fellow teenager Karmelo Anthony, was asked to leave his team’s tent “15 times” before the fateful altercation that led to Metcalf’s death. The 17-year-old witness who attended Frisco Memorial High School with Metcalf, claims he was among several other Memorial students under their team’s tent when Anthony entered their team space wearing the uniform of his school, Frisco Centennial. The witness claims that Memorial students began telling Anthony that his presence under their tent was inappropriate. “You probably shouldn’t be here, you need...