Ex-House Speaker Michael Madigan is set to return to the stand Wednesday morning, continuing testimony that will surely be some of the most crucial and closely examined of the bombshell public corruption trial.

Madigan is accused of leading a criminal enterprise designed to enhance his political power and enrich himself and his allies. Michael McClain, his longtime friend and ally, is also on trial and accused of acting as Madigan’s agent.

Former Illinois House Speaker Michael Madigan has taken the stand in his own public corruption trial, where he is accused of using his position to enrich himself and his friends, while his defense attorneys argue he was just a good public servant.