A former University of Virginia lacrosse player is taking his last shot at overturning his conviction for the 2010 murder of his former girlfriend.

Counsel for George Huguely V has filed a petition with the U.S. Supreme Court seeking a judicial review of the case against their client. Huguely was convicted in 2012 of the second-degree murder of Yeardley Love, also a UVa student and member of the women’s lacrosse team, for which he was sentenced to 23 years in prison.

Huguely, now 27, has since appealed the conviction on the grounds that his Sixth Amendment rights were violated when one of his two attorneys fell ill and could not be present in the courtroom nine days into his trial. Though his other attorney said he would be able to continue, Huguely asked the judge to delay the case until both of his attorneys could be present, but that request was denied.

Counsel for Huguely has argued that their client’s right to competent assistance was violated when he could not have both lawyers present in the courtroom. The petition filed Friday asks the court to “reaffirm the core of the Sixth Amendment right of a criminal defendant to have his choice of counsel by his side throughout the trial proceedings.”

“[Huguely’s] distinct interest in receiving not just competent assistance, but assistance from both his counsels of choice was given no weight,” the petition states.