In March, Limas pleaded guilty to racketeering and awaits sentencing. Authorities say Limas accepted thousands of dollars to appoint attorneys and grant favorable rulings.
Pena, who was on probation for aggravated robbery, faced a charge of aiding and abetting honest services wire fraud. His wife, Karina Pena, pleaded guilty to the same charge last week.
After pleading guilty Tuesday, Pena faces up to 20 years in prison.