Karim George Chmielinski (October 9, 1965 — December 20, 2024), known professionally as Casey Chaos, was an American musician, best known as the lead singer of Amen.

Between his powerful voice and the band's high-energy presence, they became well-known and popular, with people traveling from as far as Atlanta to catch their shows.

Chaos put together a new lineup, recruiting bassist Scott Sorry, drummer Luke Johnson, and guitarists Matt Montgomery (aka Piggy D.) and Rich Jones.

Between the two songs, Chaos made political death threats and it became the first of the show's episodes to have material cut by IFC, although it ran the full performance on its website.

Amen then went on a full tour of Europe including a co-headline slot with Kreator, at the Damnation Festival hosted at the University of Leeds.

In 2014, Chaos went back into the studio with Amen to begin recording a new album with Ross Robinson with Dave Lombardo on drums.

[23] Due to former commitments the album recording was not completed with Ross Robinson and Amen went on to perform at Knotfest in support of Slipknot.

[24] In late 2019 Chaos went back into the studio to continue work on the latest Amen album in the UK before COVID-19 put a hold on the recording.

Chaos collaborated with Twiggy Ramirez and members of Queens of the Stone Age on a project called Headband, who recorded music but never released it.

Chaos then founded the band Scum, with black metal icons Samoth and Cosmocrator from Zyklon, Bård Faust from Emperor, and Happy Tom from Turbonegro.

Scum eventually released an album, 2005's Gospels for the Sick,[27] which was nominated in the metal category at Norway's 2006 Alarm Awards.

[28] Amen was then meant to tour with the band, but all dates were canceled when Chaos had to undergo emergency surgery to repair 'multiple ruptured hernias'.