A father in Cary, North Carolina, has been charged after his 21-year-old son was shot during an argument with his brother on Thanksgiving about NFL players kneeling during the national anthem.

According to a local CBS News affiliate, search warrants obtained Tuesday have identified the father as 51-year-old Jorge Luis Valencia Lamadrid.

Esteban Valencia, whose injuries are not considered life-threatening, was shot after becoming embroiled in a physical fight with his brother over the protests.

The protests began in 2016 when then-San Francisco 49ers quarterback Colin Kaepernick took a knee during the national anthem before NFL games as a silent protest against racial injustice. Conservative critics, including President Donald Trump, have claimed Kaepernick is disrespecting the flag and the military.

According to the warrants, Lamadrid retrieved a shotgun when he was unable to separate his two sons after their argument turned physical.

When Lamadrid asked the feuding brothers to leave, the fight is believed to have moved into the backyard, where objects were thrown.

The victim was shot after Lamadrid was hit in the face with a water bottle, which CBS 17 reports caused him to squeeze the gun’s trigger and fire, striking the 21-year-old in the hand and leg.

Lamadrid has been charged with assault with a deadly weapon inflicting serious injury.

Wake County Sheriff’s Office did not immediately respond to HuffPost’s request for comment on the incident.