A Criminal Court jury also convicted defendant Erik Standback of aggravated assault, possession of a firearm in the commission of a dangerous felony, and reckless endangerment with a deadly weapon.
He is in custody and will be sentenced July 9 by Judge James Lammey Jr.
The shooting occurred around 2 p.m. on Jan. 21, 2017, in the backyard of a residence in the 7500 block of Shelby Cross Circle in the Hickory Ridge area of southeast Shelby County.
Standback and the victim, also 21, agreed to settle a long-simmering dispute with a fist fight attended by several other young men. Several of them began filming on their cell phones, including streaming live on Facebook.
After losing the fight, Standback went into the garage, retrieved a handgun and came out shooting, striking the victim in the back. Standback was arrested on the scene.
The victim, who was paralyzed by the shooting, testified this week from a wheelchair.
The case was handled by Asst. Dist. Atty. Jamie Kidd.