Where a defendant refused to testify against a co-defendant as required by his plea agreement, the plea agreement did not bar the state from seeking conviction for criminal contempt.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge John Z. Lee.Raul Perez-Gonzalez pleaded guilty to first-degree murder for his role in a gang-related killing. The killing occurred on an evening in January 2009 in northwest suburban Elgin. Rival gangs, including Perez-Gonzalez’s gang, engaged in posturing in …