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The sprawling federal investigation into Commonwealth Edison’s alleged attempts to sway former House Speaker Michael Madigan rocked Illinois politics to the core.

The highly anticipated trial of the so-called ComEd Four, which is expected to last up to eight weeks, will feature as many as 70 witnesses, including current and former state legislators, members of Madigan’s vaunted 13th Ward political operation, and former ComEd executives and attorneys.

At the center of the trial will also be dozens of undercover recordings of the defendants and even the famously reticent Madigan himself.

The Tribune has chronicled the events that led up to the trial and the backgrounds of the key defendants and witnesses expected to testify. Follow our writers — Ray Long and Jason Meisner — for the latest news.

Catch up on all our coverage below.

Day 25: ‘ComEd Four’ jury resumes deliberations in bribery case tied to ex-House Speaker Michael Madigan

Day 24: Jury deliberating fate of ‘ComEd Four’ in bribery case tied to Michael Madigan; prosecutors calls payments to speaker a ‘corruption toll’

Day 23: Defense attorney calls ‘ComEd Four’ bribery case ‘collateral damage’ in feds’ quest to bring down ex-Speaker Michael Madigan

Day 22: Could Michael Madigan be bought? Jurors to weigh central question in ‘ComEd Four’ trial after closing arguments Monday

Day 21: Testimony ends in ‘ComEd Four’ bribery trial, with closing arguments expected next week

Day 20: Apparent slip-up during ex-ComEd CEO Anne Pramaggiore cross-examination leads to revelation about interview with feds

Day 19: ‘We weren’t bribing Speaker Madigan’: Ex-ComEd CEO Anne Pramaggiore back on witness stand in her own defense in ‘ComEd Four’ case

Day 18: Ex-ComEd CEO Anne Pramaggiore takes stand in own defense, says Speaker Madigan cared most about ‘staying speaker’

Day 17: Former top counsel to Michael Madigan takes witness stand at ‘ComEd Four’ trial after prosecution rests

Day 16: Longtime Madigan precinct captain Ed Moody takes stand in ‘ComEd Four’ bribery trial, says speaker set him up with lobbying deal

Day 15: Former McPier leader Juan Ochoa testifies at ‘ComEd Four’ trial about his path to utility’s board

Day 14: Jurors in ‘ComEd Four’ trial see evidence from FBI raid on City Club and Jay Doherty’s condo

Day 13: Jurors in ‘ComEd Four’ bribery trial shown ‘Magic Lobbying List’ of Michael Madigan allies

Day 12: ‘I’m pretty discrete’: Jury in ‘ComEd Four’ trial hears recordings laying out role of Madigan’s confidant as go-between for utility

Week 3 recap: ‘ComEd Four’ recording shows defendants vying to stay in Madigan’s good graces just months before bribery case broke wide open

Day 11: ‘ComEd Four’ defense tries to turn Michael Madigan ‘fear and intimidation’ testimony on its head

Day 10: ‘They scared the daylights out of you, didn’t they?’ Cross-examination underway for star witness in ‘ComEd Four’ trial

Day 9: ‘Don’t put anything in writing’: Jurors see undercover videos of Michael Madigan associates in ‘ComEd Four’ trial

Day 8: Then-ComEd CEO gushes about Michael Madigan, longtime confidant on secretly recorded call played for jury

Week 2 recap: ‘ComEd Four’ trial offering a fascinating and unprecedented look into the inner workings of Madigan’s political power

Day 7: In ‘ComEd Four’ trial, Michael Madigan’s ex-political director says arm-twisting on speaker’s orders helped pass ComEd legislation

Day 6: Ex-ComEd lawyer testifies request to put Juan Ochoa on utility’s board came from Michael Madigan

Day 5: Ex-ComEd attorney testifies he was pressured by Michael Madigan associates to hire clout-heavy law firm while negotiating legislation in Springfield

Day 4: State representative testifies at ‘ComEd Four’ trial that Speaker Michael Madigan ruled caucus ‘through fear and intimidation’

Week 1 recap: Recordings in ComEd Four case show Michael Madigan playing political hardball

Day 3: Michael Madigan’s voice heard for first time on recordings played at ‘ComEd Four’ trial

Day 2: Prosecutors say ‘ComEd Four’ bribery conspiracy defendants did Madigan’s bidding, while defense says conduct was legal lobbying, ‘a profession’

Day 1: Jury selection begins in ‘ComEd Four’ bribery case involving Michael Madigan

Evidence seen — and heard — by the jury

Former Illinois House Speaker Michael Madigan speaks on Feb. 25, 2021.
Former Illinois House Speaker Michael Madigan speaks on Feb. 25, 2021.

The more than 100 secretly recorded phone calls and meetings, which were gleaned from wiretaps and confidential informants over the course of more than a year, form the backbone of the case, one of the most highly watched political trials in Illinois for years. Read more — and listen to the audio here.

Michael Madigan’s voice heard for first time on recordings played at ‘ComEd Four’ trial

‘I wouldn’t do anything to damage my speaker’: Recordings in ComEd Four case show Michael Madigan playing political hardball

Prosecutors say ‘ComEd Four’ bribery conspiracy defendants did Madigan’s bidding as defense counters conduct was legal lobbying, ‘a profession’

Legendary Madigan precinct captain expected to give ‘ComEd Four’ jury street-level view of speaker’s vaunted political operation

Ed Moody speaks to 6th District committeemen about his qualifications for a vacant Cook County Board seat on Oct. 8, 2016. Moody was chosen to fill the seat vacated by Joan Patricia Murphy, who had died of cancer.
Ed Moody speaks to 6th District committeemen about his qualifications for a vacant Cook County Board seat on Oct. 8, 2016. Moody was chosen to fill the seat vacated by Joan Patricia Murphy, who had died of cancer.

In four weeks of testimony, jurors in the “ComEd Four” bribery trial have heard from a top staffer to ex-House Speaker Michael Madigan, current and former legislators from Madigan’s Democratic caucus, and a ComEd executive at the center of an alleged plot to bribe the once-mighty speaker and help advance the utility’s agenda in Springfield.

The jury has also listened to the words of Madigan and his associates from their own mouths, through dozens of wiretapped calls and secretly recorded meetings in which they spoke about an alleged scheme to funnel hundreds of thousands of dollars from ComEd to Madigan’s cronies for little or no work.

But as the prosecution’s case comes to a close, jurors are expected to hear the earthiest view yet of Madigan’s vaunted political organization — from a guy who never would have been pegged by anybody as a government witness.

Edward M. Moody. Read more here.

A Madigan confidant. A popular executive. An insider lobbyist. A political consultant. Who are the ‘ComEd Four’?

Outside of former House Speaker Michael Madigan, the main characters in the “ComEd Four” bribery conspiracy trial are hardly household names.

One was Madigan’s loyal confidant. Another was ComEd’s popular chief executive. There’s a consummate lobbyist and a political consultant who was the face of the City Club of Chicago. Read more here.

How ex-ComEd CEO Anne Pramaggiore went from rising corporate star to defendant in bombshell corruption case

Defendant Anne Pramaggiore walks down Dearborn Street after exiting the U.S. Dirksen Courthouse in downtown Chicago following the first day of the “ComEd Four” bribery conspiracy trial, March 14, 2023.

Of all the players in the sprawling ComEd bribery investigation, the powerful politicians, connected lobbyists, precinct captains, consultants and door knockers, it’s the business executive with the background in theater who stands out as miscast in the still-unfolding drama.

Former ComEd CEO Anne Pramaggiore, a theater major from central Ohio who became a rising star in the male-dominated corporate world, often came off as a brainy mix of business savvy and homespun directness that put people, including public officials, at ease. Read more here.

‘ComEd Four’ bribery trial to put focus on ex-Speaker Madigan’s power — and state’s blurry line between politics and crime

Former City Club of Chicago President Jay Doherty enters the Dirksen U.S. Courthouse on the first day of the “ComEd Four” bribery conspiracy trial, March 14, 2023.

The City Club of Chicago dining room was filled with the usual lunchtime crowd of movers and shakers seven years ago for a speech by Commonwealth Edison’s CEO touting the utility’s new “smart grid” technology and upcoming legislative goals in Springfield.

“She really is second to none,” City Club President Jay Doherty said in his gushing October 2015 introduction of Anne Pramaggiore, who at the time was a rising corporate star and one of the country’s top female executives. Then Doherty raised a finger and pointed to another luminary he’d spotted in the audience.

“You know, while Anne’s coming up here I just realized, we have the chairman of the CHA, John Hooker, right there!” Doherty exclaimed about Hooker, one of ComEd’s top lobbyists and the newly appointed board chairman of the Chicago Housing Authority. “John, stand up! Give him a round of applause!”

Seven years after that portentous event, Doherty, Pramaggiore and Hooker will be together again on a much different stage: As defendants at the Dirksen U.S. Courthouse in one of the biggest political corruption cases the state has ever seen. Read more here.

Former ComEd VP pleads guilty, agrees to cooperate with feds in bribery case orbiting House Speaker Michael Madigan

Unidentified congressman in federal ComEd conspiracy documents is mayoral candidate US Rep. Jesús ‘Chuy’ García, sources say

Ex-US Rep. Luis Gutierrez allegedly lobbied Speaker Michael Madigan for ComEd board appointment for Juan Ochoa, according to new filing

ComEd board appointment allegedly pushed by Madigan to offer glimpse into Illinois’ strange political bedfellows

Retired lobbyist Michael McClain enters the Dirksen U.S. Courthouse on the first day of the “ComEd Four” bribery conspiracy trial, March 14, 2023.

One of the central allegations in the “ComEd Four” bribery conspiracy trial promises a fascinating look at how the unending struggle over the reins of political power in Illinois can create some odd alliances.

According to the indictment, then-House Speaker Michael Madigan participated in a two-year effort to get a onetime political nemesis, Juan Ochoa, appointed to a lucrative position on Commonwealth Edison’s board, part of a larger scheme by the utility to harness the Democratic speaker’s influence in Springfield.

Ochoa, a businessman, failed political candidate and former boss of the Metropolitan Pier and Exposition Authority, has not been charged.

Instead, he’s expected to be a star witness for prosecutors, giving his insider account of how the appointment came about, beginning with meetings with Madigan, the now-indicted longest-serving speaker in American history, and several other elite members of Chicago’s political class, including two powerful Latino congressmen and a former mayor. Read more here.