Former Oklahoma Star Tony Casillas Calls out Sooners over Joe Mixon Incident

In the wake of Florida State's dismissal of De'Andre Johnson for punching a young woman at a bar, former Oklahoma defensive lineman Tony Casillas is pointing his finger at his alma mater.

Casillas posted a message from his Facebook account to Twitter on Tuesday afternoon that criticized Oklahoma and school president David Boren for not dismissing running back Joe Mixon for a similar incident last year.

"Joe Mixon hit a woman and knocked her unconscious, and yet [he] is going to play this season," Casillas wrote while linking to ESPN.com story on Johnson's dismissal from Florida State. "This is the reason if you're an Oklahoma fan you don't want to watch this video [of Johnson's punch]."

Mixon, who was charged with "acts resulting in gross injury," was suspended for the entire 2014 season. But he returned to the team earlier this year for spring practices. 

Courtesy: 247Sports

The former Sooner great also compared Mixon's situation to an incident from earlier this year when video surfaced of a racist chant by members of Oklahoma's Sigma Alpha Epsilon fraternity. Members of the Sooners football team joined protests in the wake of the video's release.

Oklahoma expelled two members of the fraternity and suspended the school's chapter.

"[Boren] punishes a kid [for] making a bad mistake, making racial statements, kicks him...and his fraternity off campus but allows an athlete to continue the privilege of playing college football. #DoubleStandard," Casillas wrote.

MARK FOLEY/Associated Press

Casillas was a two-time first-team All-American defensive tackle at Oklahoma and won the Lombardi Award in 1985. He played in the NFL for more than a decade and won two Super Bowls with the Dallas Cowboys.

Unlike the Johnson case, video of Mixon's punch has not been released to the public—and it likely will stay that way.

According to The Oklahoman's Ryan Aber, a judge ruled against the tape's release to the public in February. The tape was reportedly shown to media members last September. 

"In the nearly three-minute long silent video, Mixon lands a devastating right hook to the face of 20-year-old Amelia Rae Molitor, knocking her off her feet," Aber wrote. "Molitor's left ear hits the table, then she falls to the ground."

Mixon is scheduled to play in his first collegiate game with the Sooners on Sept. 5 against Akron.

Justin Ferguson is an on-call college football writer at Bleacher Report. You can follow him on Twitter @JFergusonBR.