Austin Metcalf's mother has sent a chilling message to the 17-year-old football player's killer following his stabbing death.

Austin Metcalf was a 17-year-old high school student in Frisco, Texas, who was stabbed to death by another student at a track meet, according to Frisco police. Frisco police wrote in a news release that the suspect accused in the homicide is a Frisco Centennial High School student named Karmelo