Slipknot is an American heavy metal band from Des Moines, Iowa. Formed in September 1995, the group was founded by percussionist Shawn Crahan and bassist Paul Gray. After several line-up changes in their early years, the band settled on nine members for more than a decade: Corey Taylor, Mick Thomson, Jim Root, Paul Gray, Craig Jones, Sid Wilson, Shawn Crahan, Chris Fehn and Joey Jordison. Gray died on May 24, 2010, and was replaced from 2011 to 2014 by former guitarist Donnie Steele. Jordison departed from the band on December 12, 2013 for unknown reasons, followed by Steele during the recording sessions for .5: The Gray Chapter as he wanted to focus on getting married. The band is now touring with replacement musicians Alessandro Venturella on bass and Jay Weinberg on drums.