'I'm not alleged. I did it,' Karmelo Anthony reportedly told cops as he was taken into custody after he stabbed 17-year-old Austin Metcalf at the Kuykendall Stadium in Frisco.
Anthony stabbed Metcalf in the heart, killing him, after Metcalf told him he was sitting in the wrong chair at the match between their two schools, according to the late teen's family.
An arrest report says a confrontation between the two star football players began when Metcalf told Anthony he was sitting under another team's pop-up tent and told him to move, as reported by NBC DFW.
The two students from different high schools began fighting before Anthony unzipped his bag and reached in, telling Metcalf: 'Touch me and see what happens.'
The report says Metcalf then 'grabbed Anthony to tell him to move and Anthony pulled out ... a black knife and stabbed Austin once in the chest.'