MCKINNEY, Texas - Closing arguments were set for Tuesday in the trial of a Texas teenager charged with fatally stabbing a 17-year-old track athlete at a high school meet during a confrontation that students said rapidly escalated in the stadium's bleachers.

Karmelo Anthony, now 19, did not testify in his own defense over the killing of Austin Metcalf, whose death stunned a booming Dallas suburb where the two students attended different schools.

If convicted, Anthony faces up to life in prison.