Sigma is a punk rock band from Phoenix AZ, founded by Keith Wallace, Jonathan Kabir and Jeff Harder. In 2002, Jon met Jeff while his 80's metal band at the time needed a vocalist. Jon admitted that at first he did not like Jeff's vocals but liked Jeff's punk style. Shortly after that Jeff introduced Jon to Keith and the three of them decided to form a punk rock band. The band toured worldwide as a 3 piece and played over 400 shows together. Jeff left the band in 2008 to move with his family in Washington. Jon and Keith kept the band going and added on Chris Clement, Chris Griswold, Clayton Graham and Justin James. The band adopted more of a metal sound. The band often use fake blood and a lot of horror art as a part of their stage performance. Jon and Keith have currently started a new pro