The former ComEd vice president who secretly recorded his colleagues as part of a federal corruption probe began testifying against ex-House Speaker Michael Madigan on Tuesday, the first of what is expected to be multiple days on the stand.

A key witness in the ComEd Four bribery case last year has taken the stand at the corruption trial of former Illinois House Speaker Michael Madigan. Former ComEd executive Fidel Marquez said he worked for the utility company for about 37 years.

Jurors in Mike Madigan’s corruption trial heard testimony from former ComEd Vice President Fidel Marquez Tuesday. Marquez began cooperating with the FBI five years ago after pleading guilty to conspiracy to commit bribery.

In 2011, as Thomas O’Neill was in Springfield pushing for legislation on behalf of utility giant ComEd, he heard one question over and over: What did Michael Madigan think of the bill? “Everyone – I think without fail,

Jurors are hearing new testimony Monday at Mike Madigan's federal trial. Recordings of several phone calls between Madigan and his co-defendant and longtime confidant, Mike McClain, were played Monday morning.

A former utility executive said Monday that former Illinois House Speaker Michael Madigan's interests became ComEd's when legislation affecting the state-regulated utility was on the line.

The corruption trial of former Illinois House Speaker Michael Madigan continues today, with jurors hearing from the top attorney for ComEd that the 2011 “Smart Grid” bill was crucial for the company — and Madigan was crucial to any legislation’s success.