A federal jury convicted Dimora in 2012 on racketeering, bribery and other charges. The jury agreed with prosecutors that he traded political favors for work on his house, thousands of dollars and a trip to Los Vegas, among other things.
He appealed on the grounds that he'd disclosed some of these gifts on required state ethics forms -- but the jury didn't get to consider that evidence because the judge barred it from the courtroom.
In April, the 6th U.S. Circuit Court of Appeals ruled 2-to-1 that while his attorneys should have been able to introduce those forms at trial, they wouldn't have changed the end result.
Dimora appealed again, but Monday the U.S. Supreme Court declined to hear his case this term.
Christian Grostic, Dimora's attorney, said it's always a long shot trying to convince the nation's highest court to consider your case.
"But we did think we had an issue worthy of consideration, so we're disappointed," Grostic said. "There are some options for some post-conviction relief that are still open to him, but this is the end of the line for his direct appeal."
In an emailed statement, federal prosecutors said the decision vindicated the work of investigators who landed dozens of convictions in the county corruption probe.
Dimora, meanwhile, is sitting in a medium-security prison cell in Victorville, California, a three-hour drive across the desert from the Vegas strip he visited on a contractor's dime.
He's scheduled for release in 2036, when he'd be in his 80s.
