Charbonneau commission: A look back at inquiry's explosive testimony and key witnesses

On Tuesday, Justice France Charbonneauwillhand down her final report on allegations of widespread corruption in Quebec's construction industry.

The long-awaited report is the culmination of four years of work: The corruption inquiry was first announced in October 2011 by former Liberal premier Jean Charest.

The Charbonneau commission heard from 291witnesses over 261 days of testimony spread out over three-and-a-half years.

As the commission draws to a close, here's a look back at some of the key witnesses and the explosive testimony heard by Charbonneau and her fellow commissioner, former Quebec auditor generalRenaud Lachance.