Karmelo Anthony's mother, Kala Hayes, sobbed before jurors delivered a 35-year sentence for the 2025 murder of 17-year-old Austin Metcalf.
Anthony, 19, was found guilty of first-degree murder in the death of Metcalf, who was stabbed during a rain delay at a high school track meet in Frisco.
The defense argued that Anthony acted in self-defense, but prosecutors emphasized the life cut short and the impact on the Metcalf family.
A jury of white, Asian, and Hispanic members deliberated for two-and-a-half hours before reaching the verdict, which was met with protests outside the courtroom.
