Question: This band American heavy metal band founded in September 1995 included what former bassist for the band Will Haven?
Sentence (from "Slipknot (band)"): After the departure of Jordison, as of December 2015 the only founding member in the current lineup is percussionist Crahan; the other remaining members of Slipknot have been members since the release of the band's 1999 eponymous debut album.
Relevant evidence: No