MADISON, Wis. — A lottery computer programmer charged with using his inside knowledge to win rigged games across the U.S. pleaded guilty Monday to fixing a 2007 jackpot in Wisconsin — his first admission of guilt in a scandal that rocked the industry.

Eddie Tipton entered the guilty plea to one count of theft and one count of a computer crime in a courtroom in Madison, after insisting on his innocence since his arrest in 2015. Prosecutors dismissed a racketeering count and three other computer crime charges in exchange. He’s set to be sentenced on Sept. 21.

Tipton spoke only to say he understood when Dane County Circuit Judge Ellen Berz asked him if knew he was waiving his right to a trial.

Tipton faces additional charges in Iowa. Wisconsin Assistant Attorney General David Maas told Berz that Tipton plans to enter a plea in that state later this month.

Tipton and his Wisconsin attorney, John Bradley, declined to comment outside the courtroom. His attorney in Iowa, Dean Stowers, said he believed the case in that state would soon get resolved but no plea deal has been finalized.

Tipton was security director for the Multi-State Lottery Association, where he wrote and installed code for software that picked random numbers for games sold by member lotteries.

Investigators say Tipton designed his software so that on three days out of the year, he could predict the winning numbers. Tipton; his best friend, Texas businessman Robert Rhodes; and his brother, former Texas Judge Tommy Tipton, then bought winning numbers for those drawings and split the jackpots, authorities say.

Prosecutors say trio has been linked to winning tickets worth millions between 2005 and 2011 in Colorado, Wisconsin, Iowa, Kansas and Oklahoma.