Alice Walton, the billionaire daughter of Wal-Mart founder Sam Walton, has had a 2011 arrest in Parker County on suspicion of drunken driving erased from her record.The arrest was expunged during a hearing Monday in Weatherford. Prosecutor Fred Barker told the Arkansas Democrat-Gazette in October that he expected Walton’s request to be granted and that case records would be destroyed. He declined to discuss the matter Monday. “It’s a criminal offense to discuss any information related to an expunction. As such, we have no information to provide,” Barker said. Walton, 64, was arrested Oct. 7, 2011, on Interstate 20 at Farm Road 51. In September, officials said they would not file charges against Walton because the state trooper who arrested her had been suspended from his job.Tom Vinger, a spokesman for the Texas Department of Public Safety, said the trooper was suspended in March and was thus unavailable to testify in Walton’s case.Mac Smith, the Weatherford attorney who represented Walton, didn’t immediately respond to a phone message seeking comment left Tuesday by The Associated Press.Walton, who has a ranch near Millsap, has a net worth of $33.5 billion, according to Forbes magazine, making her the eighth-wealthiest American.In documents seeking to clear Walton’s record, Smith noted that the arrest was for a misdemeanor.“No information or indictment was ever filed by the state and the statute of limitations for this offense expired on Oct. 7, 2013,” Smith wrote. Court records said the trooper arrested Walton based on her performance in field sobriety tests. Walton told him that she has an injured leg and couldn’t perform balance tests under any circumstances. The newspaper reported previously that defense lawyers submitted letters from two physicians saying Walton cannot walk or maintain her balance normally. The doctors said she was injured in a motor vehicle accident in Mexico in November 1983 that left her left leg shorter than her right. Walton was convicted in 1998 of drunken driving in Springdale, Ark., after a single-vehicle wreck. In 1989, her vehicle struck and killed a woman who was walking in traffic on Arkansas 265 in the state’s northwest. Walton was not cited and police said she wasn’t at fault. Walton, whose father was Wal-Mart founder Sam Walton, has a net worth of $33.5 billion, which Forbes magazine says makes her the eighth-wealthiest American. The Parker County citation was filed a month before the opening of the Crystal Bridges Museum of Art in Bentonville, Ark, which she founded.