The rise, fall and conviction of former United Auto Workers President Dennis Williams

UAW President Dennis Williams speaks at the UAW 37th Constitutional Convention at Cobo Center in Detroit on June 11, 2018.

Fiat Chrysler CEO Sergio Marchionne, left, and UAW President Dennis Williams joke around as they answer questions on the first day of contract negotiations between the UAW and FCA in Detroit on July 14, 2015.

Fiat Chrysler CEO Sergio Marchionne, left, and UAW President Dennis Williams embraced at the start of contract talks in 2015. GM charges that Marchionne orchestrated a bribery conspiracy to corrupt three rounds of bargaining with the UAW in an effort to harm and take over Detroit's biggest automaker.

The UAW spent more than $15,000 renting this private villa for President Dennis Williams in late 2015 and early 2016, prosecutors say.

UAW President Gary Jones, left, received an award in 2018 for raising money for the union's political action committee from former UAW President Dennis Williams, right. Both of their homes were raided by federal agents Aug. 28.

The United Auto Workers used nonunion labor to build this lakefront home for retired President Dennis Williams at the union's 1,000-acre retreat in Onaway.

Federal agents investigating corruption within the United Auto Workers raided the home of retired President Dennis Williams on Aug. 28.

UAW president Dennis Williams calls for auto workers to demand their rights during a speech before thousands gathered at a pro-union rally near Nissan Motor Co.'s Canton, Miss., plant, Saturday, March 4, 2017. Participants marched to the plant to deliver a letter to the company demanding the right to vote on union representation to address better wages, safe working conditions and job security. (AP Photo/Rogelio V. Solis)

(l-r, GM CEO Mary Barra, UAW President Dennis Williams, Cathy Clegg GM's vice president of North America manufacturing and labor relations and Cindy Estrada, UAW Vice President shake hands to signal the start of the contract talks.) Officials from General Motors Co. and the UAW will meet to kick off 2015 labor negotiations during a press event Monday. UAW President Dennis Williams, GM CEO Mary Barra as well as UAW Vice President Cindy Estrada and Cathy Clegg, GM's vice president of North America manufacturing and labor relations, will be on hand. Detroit, Mi, July 10, 2015. (Clarence Tabb Jr./The Detroit News)

From left, UAW officers Norwood Jewell and Dennis Williams, FCA CEO Sergio Marchionne, and Glenn Shagena, North American labor relations chief for Fiat Chrysler, announce a tentative labor agreement on Sept. 15, 2015 at the UAW-FCA Training Center in Detroit.

UAW president Dennis Williams speaks at the UAW 37th Constitutional Convention at Cobo Center in Detroit on June 11, 2018.

UAW president Dennis Williams, left, and UAW vice president Cindy Estrada during the press conference announcing the agreement reached between the UAW and General Motors on Oct. 28, 2015.

President makes a point, flanked by General Motors CEO Mary Barra and UAW President Dennis Williams.

President Obama and UAW President Dennis Williams toured the North American International Auto Show in January 2016. Williams credits Obama for taking bold action to save the auto industry.

(L-R)United Auto Workers President Dennis William, US President Barack Obama and 2016 North American International Auto Show Chairman Paul Sabatini tour the North American International Auto Show January 20, 2016 in Detroit, Michigan. / AFP / Brendan SmialowskiBRENDAN SMIALOWSKI/AFP/Getty Images

New UAW President Dennis Williams puts his fist up in solidarity with union brothers and sisters during his keynote speech at the UAW's 36th Constitutional Convention 2014 at Cobo Center in Detroit, Thursday, June 05, 2014.

New UAW President Dennis Williams, left, shakes hands with Teamsters General President James P. Hoffa as he introduces the legendary union leader during the UAW Convention in Detroit.

Dennis Williams and Bob King prepare to embrace after Williams was overwhelming elected as the next United Auto Workers president by delegates at the UAW constitutional convention in Detroit.