A Tennessee trucker who posted an eBay auction offering sensitive personal information that Las Vegas casinos kept on high-rolling clients has lost a bid to overturn his four-year prison term and conviction.

Ruling 2-1, a three-judge panel of the 9th U.S. Circuit Court of Appeals on Thursday set aside a nuanced legal argument concerning the defendant’s mental state at the time of the 2007 crime.

Jeffrey Greer, 52 years old, was convicted of two counts of extortion and two counts of racketeering in 2008, after the FBI disrupted his plot to extract money from the MGM Mirage and Harrah’s E...