In recent years, Texas courts have grappled with high-profile cases involving teenagers who claimed self-defense after fatal stabbings during school-related incidents. Central to both was the question of whether the use of deadly force was justified when the defendant faced physical confrontation. The convictions and sentences handed down highlight how juries evaluate self-defense claims based on the specific facts, including the sequence of events, proportionality of response, and context of the altercation.
On April 2, 2025, at a Frisco Independent School District track meet delayed by rain at David Kuykendall Stadium, 17-year-old Karmelo Anthony of Centennial High School sought shelter under a tent belonging to rival Memorial High School. Witnesses testified that Anthony was repeatedly asked to leave—about 15 times over roughly four to six minutes. Anthony responded with words to the effect of “Touch me and see what happens” while reaching into his backpack. Austin Metcalf, a 17-year-old Memorial High School student and track athlete, then confronted and pushed Anthony (accounts described it variably as a small shove or a two-handed “lineman move”). Anthony pulled a 5-inch pocket knife from his backpack and stabbed Metcalf once in the chest, perforating his right ventricle. Metcalf collapsed, received CPR from coaches and trainers, and was pronounced dead at the hospital. Anthony fled briefly but surrendered to police, telling officers he acted to protect himself after Metcalf “put his hands on me” and stating he believed it could constitute self-defense.
Anthony, tried as an adult, pleaded not guilty and argued self-defense throughout his June 2026 trial in Collin County. His attorneys contended he reacted in a split-second of fear after being pushed by a larger opponent while seated in a vulnerable position under the rival tent. Prosecutors countered that Anthony had provoked the confrontation by refusing to leave and escalating with the knife, making the response disproportionate to a shove. The jury deliberated less than three hours before rejecting the self-defense claim—and a “sudden passion” argument that could have capped sentencing at 20 years—and convicting him of first-degree murder on June 9, 2026. The same jury sentenced Anthony, then 19, to 35 years in prison the following day. He will be eligible for parole after serving half the sentence.
A parallel case unfolded at Belton High School in Texas, where self-defense was also the cornerstone of the defense. In that incident, Caysen Allison fatally stabbed fellow student Joe Ramirez in a school bathroom during a confrontation. Video evidence and witness testimony showed Ramirez throwing the first punch. Allison’s legal team maintained he acted in self-defense during what they described as a fight for his life, noting prior tensions between the teens and Allison’s explicit warning before the strike. Unlike Anthony’s murder conviction, a jury convicted Allison of the lesser charge of criminally negligent homicide. In June 2025, he was sentenced to the maximum of 10 years in prison after a deadly-weapon finding by the judge.
Both cases involved Texas teenagers who brought knives to school events, faced physical contact from others, and asserted they acted only to protect themselves. In each, the self-defense argument turned on whether the initial push or punch justified deadly force and whether the defendant had provoked or de-escalated the situation. Yet the juries reached markedly different conclusions: Anthony received a 35-year murder sentence, while Allison’s conviction on a reduced charge resulted in a 10-year term. These outcomes reflect how self-defense law in Texas—rooted in statutes allowing reasonable force to protect against unlawful force—depends on the jury’s assessment of the evidence, witness credibility, and the precise circumstances of the encounter. Public attention to both trials underscored the enduring challenge of applying self-defense principles when teenage conflicts turn deadly.
SOURCES:
Karmelo Anthony sentenced to 35 years for murder in Texas track meet stabbing – ABC News
Why Caysen Allison’s attorney says the 10-year sentence is unconstitutional | kcentv.com
Karmelo Anthony’s defense attorney on the bond reduction | FOX 4 Dallas-Fort Worth
