"This decision is not a result of the ongoing NCAA review," Davis said in a prepared press release. "Marvin has violated team rules and has neglected his responsibilities to the team."
Austin will not play Saturday against LSU in the Chick-fil-A Kickoff Game in Atlanta.
The Washington, D.C. native is also facing seven traffic-related charges, including a misdemeanor noise ordinance violation, in Orange County district court. His court dates are scheduled for Sept. 15 and Oct. 6, according to court records.
Austin was selected to the 2010 Preseason All-ACC team, and named to both the Outland Trophy and Bronko Nagurski Trophy watch lists.
He started 11 games at defensive tackle and earned second-team All-Atlantic Coast Conference honors in 2009 after posting 42 tackles, including six for losses and four sacks for 40 yards. He also forced one fumble, had one fumble recovery and broke up three passes.