A Texas teenager convicted of fatally stabbing a 17-year-old athlete at a high school track meet is arguing that a judge did not fairly preside over the high-profile case and is asking for a new trial.

Karmelo Anthony, now 19, was convicted of murder and sentenced to 35 years in prison after a Collin County jury in June rejected his claims of self-defense during a confrontation with Austin Metcalf in the stadium bleachers last year.

Hearings on Anthony's requests for a retrial and a new judge were set to begin Wednesday in suburban Dallas.