Tragedy in the Track Stands: A 35-Year Sentence and Fateful Moments Captured on Surveillance Video
FRISCO, Texas — Newly released video from an officer’s body camera and a surveillance camera at a Texas running track captures the moments after a teenage athlete fatally stabbed another teen from a rival team in the stadium bleachers during a high school meet last year. The tragedy has left the public deeply shocked.
Karmelo Anthony, 19, was convicted of murder on June 10 in the death of Austin Metcalf, 17, and sentenced to 35 years in prison. A jury rejected Anthony’s claims of self-defense. The videos were included in a batch of evidence released by the Collin County court following the conclusion of the trial, exposing the perpetrator’s psychological state and actions immediately after the crime.
Chronology Through the Lens of Surveillance Cameras
The surveillance video shows the track and bleachers on a rainy day. Amid the quiet atmosphere of a meet interrupted by the weather, chaos suddenly erupts.
Suddenly, a figure wearing a gray sweatshirt is seen popping up from behind a yellow tent and then running down the steps. The video has no sound, but the panic and urgency are evident in every step taken by the individual—later identified as Karmelo Anthony.
He got to the bottom of the bleachers, tripped and fell on the ground, and then kept running along the edge of the fencing that separates the bleachers from the running track. He stopped briefly, turned to look at what appeared to be someone chasing him, and then kept running.
After making his way partway around the track, he was joined by an unidentified person. They stopped to talk and then hugged—a tense embrace in the middle of a storm. They started walking again and were joined by another person. After talking more, Anthony walked toward the fence where he appeared to meet up with a police officer.

Moments of Handcuffing and Belated Cries
While the surveillance video shows Anthony’s chaotic flight, the body camera worn on the officer’s chest captures a close-up of the psychological collapse of a teenager who had just taken another life.
The officer put him in handcuffs and walked him toward the police cruiser. Anthony obeyed the officer’s commands and then started crying. The tough exterior of the 19-year-old completely vanished as the handcuffs tightened around his wrists.
In a broken voice, Anthony repeatedly tried to explain his actions to the police:
“He put his hands on me,” Anthony said in a broken voice. “I told him not to. He put his hands on me.”
These choked words were the core of the self-defense argument that Anthony and his defense attorneys attempted to present in court. He wanted to prove that his actions were a spontaneous reaction to a physical threat or assault from the victim. However, the officers escorted him to the police cruiser and placed him inside without offering a response.
A Sentence for Impulsivity: Murder, Not Self-Defense
At the trial in early June, prosecutors presented damning evidence to completely refute Karmelo Anthony’s claim of self-defense. The tragedy stemmed from a simmering hostility between rival high school athletic teams, but Anthony’s choice of extreme violence turned a youth dispute into a horrific homicide.
The prosecution emphasized that:
- Bringing a dangerous weapon (a knife) to a high school sporting event demonstrated preparation or a readiness for violence.
- Witness testimony and forensic evidence showed the severity of the stab wound far exceeded the limits of any legally permissible self-defense.
- The distances and sequence recorded on camera indicated that after the initial conflict, the victim posed no ongoing threat to Anthony’s life that would justify self-defense.
After carefully reviewing the witnesses, physical evidence, and particularly this set of scene videos, the Collin County jury rejected Anthony’s claims of self-defense and convicted him of murder. The 35-year prison sentence is a steep but fitting price for taking the life of a 17-year-old with a bright future like Austin Metcalf.
A Wake-Up Call on School-Related Violence
The fatal stabbing at the running track in Frisco, Texas, serves as a painful reminder of escalating violence among youth, particularly the extreme hostility in the name of school rivalry. A sporting event meant to celebrate sportsmanship and teamwork ultimately became a crime scene—leaving one family to mourn a 17-year-old son forever, and another family to watch their 19-year-old spend his youth behind bars.
The newly released footage serves as more than just legal evidence; it is a haunting, visual lesson. Anthony’s broken words inside the police cruiser, “He put his hands on me…”, may reflect the reality of a physical altercation, but they can never justify the decision to use a knife to settle a dispute. A single moment of impulsivity has left indelible grief for both families and a deep scar on the Texas school community.