In December 2005, Graziadei and Evan Seinfeld performed Biohazard's "Punishment" with Dino Cazares of Fear Factory, Andreas Kisser of Sepultura, Adam Duce of Machine Head and Joey Jordison of Slipknot.
Billy Graziadei, owner of recording studio Firewater Studios in Los Angeles, California, current lead vocalist of American rock band Biohazard and former lead vocalist for American rock band Suicide City
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